Please try this:

1. logout of the browser here: https://www.mixo.dev/login-success.

2. Logout of OneDrive in your browser.

3. Disconnect OneDrive in MIXO (if connected)

4. Logout of MIXO.

5. Login and reconnect OneDrive.

If upload doesn’t start immediately, select all tracks, right-click and select Upload Tracks.

Remko

MIXO DJ team