Authentication token invalid
4.5
The system rejects your login token as malformed, tampered with, or unrecognized.
Symptoms
- "Invalid Token" error
- 401 Unauthorized
- App won't load data
Possible Causes
- Server-side secret change
- Token corruption
- Cross-site request forgery (CSRF)
Step-by-Step Fix
1
Clear App Data/Cache
Wipe the app storage to delete the corrupted token.
2
Check for Multiple Logins
Some services invalidate old tokens when you log in on a new device.
3
Disable Ad-Blockers
Some blockers interfere with the headers that carry authentication tokens.
When to See a Technician
An "Invalid Token" error often happens if the server's security certificates have been updated.
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