Got the exact same issue with FP5, /e/OS 3.7 (Android 15) : it used to work just fine, but then I deleted the stored data + cache in order to check something (oh I definitely shouldn’t have done that 
).
- Because I had an issue with a banking app, I tried[ the method]([LIST] Banking Apps on /e/OS - #481 by AudeM) that solved this past issue : FAIIIIL
- I turned a few knobs in the Settings > System > MicroG/App compatibility section, to no avail (changed the phone profile to native, Nexus 5, emulation arm, Motorola Moto G + stopped app certification + installed anonymously our with a Google account)
- I’ll try a few other things, but it’s really really annoying
- Also ! The app works on a friend’s phone with the exact same specs, except this friend wasn’t stupid enough to the app’s data : so it’s really a first connection issue
- To be noted as well : I deleted the data because I kept having an in app notification about some network check (everything is connected, I assume they just wanted to update the bridge thingy); when I clicked on said notifications, all I got was the exact same message as you right now