Can't load expo app: Something went wrong

Question

I've created an expo app with exp init MyApp command and started it by running exp start in MyApp directory.

Then I'm scanning barcode which was printed in console with expo mobile app on android device.

Then "Something went wrong" screen is rendered instead of the app.

View log shows "Uncaught Error: Couldn't load exp://.....".

No errors in expo packager console output.

It used to work sometimes ago.

This is still happening with version 2.25.2 even after tried everything possible, from just refresh with r, to clean cache or even delete and reinstall. Basically it doesn't do the basic reason why is been developed — Carmine Tambascia, Sep 09 '22 at 10:08

score 58 · Answer 1 · answered Mar 05 '19 at 06:00

58

What solved this for me was simply changing the connection from LAN to Tunnel. When you start an expo app, a browser window will open with a URL like http://localhost:19002/. Along the left side is a Connection option set to LAN by default. Changing it to Tunnel before scanning the QR code with the expo app solved it.

answered Mar 05 '19 at 06:00

Steve Carey

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1

that was helpful for me! – Federico Caccia Aug 28 '19 at 22:23
1

Worked for me, too! This should be the approved answer. – LozzerJP Jun 18 '21 at 18:07
thanks +1 and please approve this answer – Chandler Bing Jan 06 '22 at 18:58
But what if you want to run it locally? – B-Tron of the Autobots Aug 30 '22 at 01:23
Indeed, if you run a backend locally and use the app as frontend in tunnel mode you cannot connect to the local backend. – Yannick Mussche Oct 10 '22 at 09:16

score 51 · Answer 2 · answered Jul 18 '17 at 12:44

51

For me the problem was happening when running over WiFi, as the tools always use the your first connection (you can check it by running ipconfig) and my first connection was internet.

If that's you case you may try this workaround for changing you connections priority:

Go to Control Panel > Network and Internet > Network Connections
Right click the desired connection (Higher Priority Connection)
Click Properties > Internet Protocol Version 4
Click Properties > Advanced
Uncheck 'Automatic Metric'
Enter 10 in 'Interface Metric'
Click OK

answered Jul 18 '17 at 12:44

RMalke

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cant find the Network Connections option on Windows 10 – Karan Singh Oct 13 '20 at 21:25
@KaranSingh in the search bar next to start, type "network connections", that will show `View Network Connections` which is what you want. – monsto Feb 12 '21 at 20:01
I've tried, and it's not working – Nam Lee Sep 02 '22 at 15:23
Using the same wifi on laptop and Mobile fixed it for me. – Manik Verma Sep 17 '22 at 13:04

score 16 · Answer 3 · answered Feb 12 '18 at 22:58

16

For my case, using wireless adapter, I had to make my Network profile private. 1) Go to Properties of wireless network 2) Make network profile private

answered Feb 12 '18 at 22:58

Masoud

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On Windows 10, your solution worked for me. Thanks for sharing! The exact steps: (1) Open the Start menu, and type "network status" (2) Click on "Change connection properties" (3) Change from public to private – wfarid Feb 05 '21 at 01:39

score 14 · Answer 4 · answered Jan 09 '18 at 23:38

In my case, the issue was fixed by doing the following on my Android (Galaxy Note 5):

Go to Settings > Apps > Application Manager > Expo
Scroll down to Draw over other apps and toggle it off and then on again
Close out of everything, re-open expo, and try connecting

It still threw an issue once before working perfectly upon further tries.

score 11 · Answer 5 · answered Mar 24 '17 at 14:58

11

It was needed to reset "Draw over other apps" permission for Expo mobile app.

How that is fixed on Android 6.

Settings->Apps, press "gear", find "Draw over other apps" item and select it. Find "Expo" app, select it. Enable "Permit drawing over other apps" option in case it is disabled. Otherwise, disable and enable it again.

answered Mar 24 '17 at 14:58

humkins

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That was the fix for my 1Plus also. – tim92109 Sep 04 '19 at 17:08

score 9 · Answer 6 · answered Jun 25 '19 at 05:22

9

Make sure that you are using the same wireless network for iOS or Android phone as your computer.

answered Jun 25 '19 at 05:22

Rohit Katariya

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score 4 · Answer 7 · answered Jul 05 '17 at 07:54

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In my case, I had "host" set to 'localhost' in the XDE - which of course won't work on my physical device ;-) So, if you want to debug on a physical device, make sure your host is set to LAN instead. (Tunnel would work too, but would make debugging painstakingly slow)

answered Jul 05 '17 at 07:54

jhm

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Tunnel doesn't work for me, but LAN does. Can anybody explain the difference here? – Stanley Luo Oct 16 '17 at 06:39
AFAIK, tunnel hosts your app bundle on a CDN online, which means each time you build, you'll have to wait for XDE to upload the new code, and the Expo client to download it again. This makes it easy for remote debugging/developing, but adds latency overhead. LAN, instead, hosts the bundle on your local network, reducing the latency considerably. – jhm Apr 09 '18 at 08:21

score 4 · Answer 8 · answered Jul 30 '20 at 15:16

4

For me its worked by selecting the tunnel connection rather than LAN in metrol Bundler.. Try it out....

answered Jul 30 '20 at 15:16

Mahesh Rachha

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score 3 · Answer 9 · answered Jul 05 '17 at 07:34

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In my case, expo app was outdated. I just updated expo from store and it started working.

answered Jul 05 '17 at 07:34

Swapnil Patwa

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This was the case for me. Wish it was more obvious that was the cause. – Jay Wick Dec 26 '19 at 05:28

Ripal Patel · Answer 10 · 2021-02-12T10:51:33.270

3

In my case, it works when I changed connection LAN to Local. but it requires to connect phone through the data cable.

edited Feb 12 '21 at 10:51

answered Feb 12 '21 at 10:11

Ripal Patel

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score 3 · Answer 11 · answered Oct 06 '21 at 13:49

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If you have a similar issue but the error says 'Uncought Error: java.lang.Exception: No launchable update', make sure you remove the "runtimeVersion" from your app.json while developing. Strangely enough, having "runtimeVersion" present works on iOS but it will fail to run on Android Expo Go app.

answered Oct 06 '21 at 13:49

Symyon

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Thanks, saved my task today. Even more strangely it fails only in the first (test) run. – Mehmet Kaplan Dec 26 '21 at 05:47
Hey, you made my day! It drove me crazy to find a solution and that fix worked perfectly! Thank you! – JuanO Feb 07 '22 at 16:04

score 2 · Answer 12 · answered Sep 08 '18 at 20:16

I had the same problem and I solved it by deactivating the Virtualbox internet connection, that happens because Node take that connection to start the packager.

Control Panel -> Network and Internet -> Network Connections
In my case is "Virtual Box Host-Only Network"
Right clic on that, and Deactivate

score 2 · Answer 13 · answered Oct 28 '18 at 10:09

For anyone that using ESET firewall, you have to go into firewall rules and allow ports 19000,19001,19002, Advanced->Rules->Edit, on General tab select Direction->Both, Action->Allow, then visit Local tab and on port field add the mentioned ports above, click ok. Do this action for every port you need to add.

score 2 · Answer 14 · answered Jan 03 '21 at 17:26

2

In my case, the problem was not with the firewall the problem was with my internet I was running my computer and phone on two different internets then I connected my phone to the router which is connected to my computer and again I tried it worked

answered Jan 03 '21 at 17:26

SuryaDevelops

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score 2 · Answer 15 · answered Mar 18 '23 at 11:09

2

I had the same issue and fixed it by running this command. -it will clear the cache and start your expo project again.

expo start -c

I hope it will work fine.

answered Mar 18 '23 at 11:09

Mohd. Anas Siddiqui

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score 1 · Answer 16 · answered Dec 09 '17 at 19:53

I had the same problem and fixed it on Windows 10 by making my machine discoverable on the network:

Click wifi icon in app drawer.
Go to the list of wifi connections and click your connection.
Click "Properties". This opens up the page associated with your connection.
Under "Make this PC discoverable", turn the slider to "On".

score 1 · Answer 17 · answered Jun 06 '20 at 22:50

For macOS users and if you are running over Wi-Fi:

Choose Apple menu > System Preferences, then click Network
Click Wi-Fi in the list at the left, then click Advanced
Find the network you are connected to
Then drag it to the top of the preferred networks list to give highest priority

This procedure solved my problem.

score 1 · Answer 18 · answered Dec 13 '20 at 09:23

1

For me, expo wasn't started. So expo start in VS Code terminal solved it.

answered Dec 13 '20 at 09:23

Joel Wiklund

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score 1 · Answer 19 · edited Jan 22 '22 at 08:54

1

It depends on what OS are you using. If it is Windows 8 or earlier, try updating the version. In Windows 10 and Windows 11 it should work correctly. Try installing expo globally instead of local install.

You should also install expo in the project root directory after project setup:

npm i expo // or npm i -g expo for global installation

If you are using yarn, then try npm as well.

edited Jan 22 '22 at 08:54

Ali Tourani

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answered Jan 21 '22 at 06:35

TrainerCheese

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"You should also install expo in the project root directory after project setup" bingo! - that fixed the issue for me *smacks forehead* – Jillian Hoenig Sep 30 '22 at 00:58

score 1 · Answer 20 · edited Mar 25 '22 at 00:52

According to me, what have solved my issue were a few things below:

Restart Expo and then try scanning the barcode once again.
You can also reload the application by clicking R on Code editor. And the caption "Something went Wrong" will reload.
You can check the internet of your mobile device and the laptop/desktop is connected with same network.
Restarting the project sometimes also helped me. As the file does not compile properly it sometime create this issue.

Hope this you will your issue resolved soon.

score 0 · Answer 21 · answered Apr 25 '17 at 21:38

I believe this issue is happening due to mismatch version of your AVD and your expo mobile application. I created new AVD with newer version of Nexus 6 API and issue was resolved. I also needed to reset "Draw over other apps" permission for Expo mobile app.

score 0 · Answer 22 · answered Jul 20 '17 at 11:44

For me, I have to close and kill expo (from RAM) AND close the QR Code overlay view to get it work on Android 5.1.1.

Sometimes I have to wait a few minutes or I get a camera view and a text above about scanning the QR Code (but without a scanner over the camera view).

score 0 · Answer 23 · answered Aug 10 '18 at 21:32

If you're not able to load the http URL in your phone's web browser, try using the tethering/mobile hotspot feature on your phone (beware of data usage, though), connecting your computer to that WiFi network, and restarting the packager. If you are using a VPN you may need to disable it.

score 0 · Answer 24 · answered Sep 21 '18 at 10:23

0

I solved it by deactivating it, although you could also open port 19000, which is used by Expo.

answered Sep 21 '18 at 10:23

maucodev

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score 0 · Answer 25 · answered Sep 19 '19 at 08:05

0

Uninstalling and reinstalling expo on my Mac cleared this for me. Expo was complaining about being out of date.

answered Sep 19 '19 at 08:05

Enty

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score 0 · Answer 26 · answered Jan 07 '20 at 10:57

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Do some things.

ForceStop App.
Restart App.
Clean Cache and Clear Data.
Else due to outdated expo. Update expo from play store.

Note: Expo no longer available for IOS physical devices.

Let me know if any issue occurred!

answered Jan 07 '20 at 10:57

Muhammad Saqib Javed

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Could you please provide a source for the information stating that Expo is no longer available on iOS physical devices? – Attila Feb 03 '20 at 19:23
https://blog.expo.io/upcoming-limitations-to-ios-expo-client-8076d01aee1a – Muhammad Saqib Javed Feb 17 '20 at 20:16
That article only mentions that you won't be able to open the app via the QR code or if the app belongs to another Expo account. Besides, that article is 2 years old and is no longer valid. I just tested and I am able to run Expo on my physical devices and scan the QR code to open the Expo app. – Attila Feb 18 '20 at 03:36
@Attila can you still scan qr? – wobsoriano Mar 12 '21 at 10:25

score 0 · Answer 27 · answered Mar 03 '20 at 22:43

0

In my case was that the phone was connected to a VPN (CyberGhost) and it showed up only a white screen D:

answered Mar 03 '20 at 22:43

Gian Marco Ferrara

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score 0 · Answer 28 · answered Apr 12 '21 at 12:33

0

In my case, windows firewall was blocking it. So, I made it run by turning the firewall off.

answered Apr 12 '21 at 12:33

Aayush Patniya

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score 0 · Answer 29 · answered Jul 06 '21 at 21:54

I think that the solution for this might be the most simplest thing. What works for me when the app doesn't load on the emulator using expo is just clicking X and closing the info alert that pops up. You'll see the following Info Alert and if you close that out and try hitting the running on Android button again, then it should work. Otherwise deleting and creating a new virtual device also helps incase the cache or expo installation on the device is really causing problems.

score 0 · Answer 30 · edited Sep 20 '21 at 15:27

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That issue was solved very easily following these steps:

Sign in with the expo mobile app using your expo account.
When we run the app using the expo start command can see the localhost web page, In that web page left side can see Connection, by default it is Land, change it to the Tunnel.
Scan the QR code.

edited Sep 20 '21 at 15:27

Pierre.Vriens

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answered Sep 20 '21 at 05:03

9Tharaka

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score 0 · Answer 31 · answered Oct 17 '21 at 11:53

Local connection works for me.

prerequisite :

Add the adb.exe path to environment variables.

(In my case : D:\AppDevTools\Android\Sdk\platform-tools)

Connect your android mobile phone to your pc using a USB cable.

Enable USB debugging on your mobile phone.

score 0 · Answer 32 · answered Jan 18 '22 at 21:49

0

for me it was the antivirus security firewall i turned it off it run well

answered Jan 18 '22 at 21:49

Ahmed eltarouty

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score 0 · Answer 33 · answered Jan 31 '22 at 18:46

None of these solutions worked for me on an Android Emulator. But I figured it out: It was because of the proxy settings I made months ago and I forgot to remove.

For Android Emulator it can be solved by:

Click on the 3-dots icon in the side-bar.
Go to settings --> Proxy.
Check No Proxy.

voila.

score 0 · Answer 34 · answered May 16 '22 at 23:47

0

For me it was due to another server running on port 19000. Node asked permission to run the server on port 19001 to which I responded 'Y'. This was the problem. I stopped the other server and allowed Expo to run on the default 19000 port, and it worked.

answered May 16 '22 at 23:47

Adrian Bartholomew

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score 0 · Answer 35 · answered Oct 05 '22 at 21:18

In my case, I have solved the problem in this way(Windows):

First of all, you need to connect to the same Wi-Fi with your computer.
Secondly type ipconfig to learn your computer's local IP. Assume that it is 192.168.0.2. Now, type the url exp://192.168.0.2:19000 to your phone browser's addresbar(It is 19000 because metro bundler work at port 19000 as default). Probably, it will direct you to the Expo App and your app will work.

If it does not work even so, Enter Control Panel>Network and Internet>Network and Sharing Centre>{the wifi that you are connected}>Properties>Internet Protocol(TCP/IPv4)>Advanced> and disable Automatic metric and type 10 in Interface metric value, probably this will fix the issue. At least, in my case it fixed.

This problem is caused by QR code which directs your phone to the 127.0.0.1, which is localhost and therefore can not access computer from there.

score 0 · Answer 36 · answered Nov 09 '22 at 05:51

0

Sometimes when you have this kind of errors, the only thing you need to do in order to fix it is disconnect and connect again to your network from your pc and your phone.

I was having this same error and this worked for me!

answered Nov 09 '22 at 05:51

Raymond D. Mora

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Can't load expo app: Something went wrong

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