General Troubleshooting:
Check your network – Switch between Wi-Fi and mobile data.
Restart the game – Close and reopen it.
Restart your device – This often resolves minor glitches.
Check for server maintenance – Visit the official channels for updates.
Third-Party Login Issues:
If you're using Facebook, Google, or Apple login, ensure those services are working and updated.
Technical Fixes:
Update the game to the latest version.
Clear cache (Android):
Go toSettings > Apps > Haikyu!! FLY HIGH > Storage > Clear Cache.Reinstall the game from the official store.
Still having trouble? Contact Customer Support and provide:
Device model
OS version
Error message (if any)
Your Player ID or account info