We distribute the test versions of our iOS apps through HockeyApp custom enterprise app store. Because of ASPN shenanigans our iOS developer refreshed some of our certificates. Since our two recent releases I cannot start the apps because they are from an "untrusted developer".
The procedure for this would be easy normally, you just have to navigate to Settings -> General -> Device Management > Enterprise App > ...
and manually Trust
them (I've been there before and I've done that in the past "Untrusted App Developer" message when installing enterprise iOS Application, https://support.apple.com/en-us/HT204460). But I get a nonsensical error suggesting that I'm not connected to the internet. Since I'm connected to wifi the verification obviously fails because of another reason, but I don't know why.
My iPad is a 3rd gen iPad with the latest possible iOS: 9.3.5.
Now I got to the point that I deleted all the apps belonging our enterprise developer organization. After that I first trusted the organization itself, which was successful. I installed again only the two problematic newest app releases so I can verify them. But I still get this nonsensical error. How can I overcome this?