I'm using the right google-services.json file but unable to receive notifications. It was working fine before. I tried with Postman but it says mismatchSenderID. I checked and verified each and everything is correct but still not receiving Push Notification. Any help will be appreciated.
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have you check out this https://stackoverflow.com/questions/37863106/fcm-getting-mismatchsenderid – mili2501 Jan 27 '20 at 12:00
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Yes but nothing worked for me – Mehtab Ahmed Jan 27 '20 at 12:01
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I faced same issue what worked for me is: - Delete build folder from app directory - Clean project - Restart Android Studio - Rebuild project - Uninstall app from device - Run
Hope this will work for you too if everything else is fine because sometimes due to down internet or some other issue project may not build properly. ;)

Naseer Attari
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