Ok I might've found a solution to this problem by accident!
It took my few hours to get this done but it seemed to work. This is what I would see when I tried to login: https://snipboard.io/MRU0Ly.jpg and I finally got it fixed.
Before I explain what I did we need to change some settings first so we're on the same page. Maybe this could work for you before moving to the next solution so try this first and then move on to next step f it doesn't:
- Go to Settings -> Location -> Location services -> Turn on both Wi-fi and Bluetooth scanning
- Go to Settings -> Apps -> Sandboxed google play -> Turn off option "Reroute location requests to the OS"
- On the same screen from above - go to Play services app info -> Permissions -> Make sure sensors and network permissions are on
- Go to Settings -> Apps -> Grindr -> Turn off option "Exploit protection compatibility mode"
Didn't work? That's fine. It initially didn't for me too but this is what I have done to make it work (keep the changes made above):
1. Uninstall Grindr completely from your phone first(!)
2. Install F-droid if you haven't already
3. Go to settings in F-droid: Settings -> My Apps -> Repositories
4. Click plus icon below and add this repository manually: https://microg.org/fdroid/repo. This will give you access to apps like microG companion, services and Framework proxy
5. Search for those apps in search bar individually, press on them and uninstall each and every one of them
6. Go to "apps" application provided by GrapheneOS and install Google Services trio
7. Go to google store and login
8. While in google store - install grindr and try to login again in the app
Let me know if it worked for yall because it sure did for me