Hey there, sorry to hear about the trouble with that error. Please try the following steps and see if that helps:
- Do not uninstall the game yet if your account is still a Guest account, as this could risk losing your progress.
- Force-close FC Mobile and restart your device.
- Turn Airplane mode on and off.
- Test the game on both Wi-Fi and mobile data.
- Make sure you have at least 2–5 GB of free storage available.
- Check that both FC Mobile and your device’s OS/software are fully up to date.
If the issue continues:
- On Android, clear the app cache.
- On iPhone/iPad, offload the app.
Only try a full reinstall if your account is already linked to EA, Google, Apple, or Facebook.