Error 37 appears at launch when Supercell cannot validate your account. Maintenance, Supercell ID session expiry, and unstable mobile data are frequent causes. Check Brawl Stars status before reinstalling.
Server or clientUpdated 2026-06-10
Supercell ID sessions
Switching devices or long idle periods can invalidate sessions. Re-linking Supercell ID or signing in again often clears 37 when servers are healthy.
How to fix step by step
- 1Check Brawl Stars server status on Oracnoos.
- 2Force-close Brawl Stars and reopen after 30 seconds.
- 3Toggle airplane mode briefly, then reconnect to stable Wi‑Fi.
- 4Sign out and back into Supercell ID in game settings.
- 5Update Brawl Stars from your app store.
- 6Avoid VPN on mobile — Supercell may block suspicious routes.
- 7Reinstall only if Error 37 persists when status is operational.