It sounds like you might be facing a login loop issue, which can sometimes happen due to network restrictions or app-related glitches. If you're using a VPN on Firestick or on your PC, try disabling it temporarily and then attempt signing in again. Some apps have trouble connecting when a VPN is active.
Additionally, you can try the following fixes:
- Clear the app cache and data
- Restart your PC and router
- Try signing in using a different network
- Ensure your app is up to date
If the issue persists, checking your firewall or security settings might help, as they could be blocking the connection. Let me know if you need further troubleshooting!