Title: JWT expired error during login using npx convex dev due to system time mismatch

[Pranto-Paul]

When attempting to log in to Convex via the CLI using:

npx convex dev

I encountered a consistent error where the login process would fail, even after confirming in the browser, Though the user code was correct each time .

What I did:

• Ran npx convex dev in the terminal.
• The CLI prompted me to log in and opened the browser with the device code.
• I confirmed the login in the browser successfully.

However, the terminal returned this error:

✖ Login failed with error: RPError: JWT expired, now 1751073925, exp 1751028974

Root Cause:

The issue was caused by my system clock being out of sync with the actual time for my timezone. The JWT token issued during login was already considered expired due to this mismatch.

Solution:

After adjusting my system time to match the correct local time (by enabling “Set time automatically” in Windows), the login succeeded without any issues.

[thomasballinger]

Thanks for reporting, could be we could show a better error here.

[thomasballinger]

This is expected behavior, clock skew between the service minting JWTs and the Convex backend is expected to cause failures like this. We just added some better auth error reporting on development instances, so closing this.