Sync not working - Stuck on error "Internet connectivity to Microsoft OneDrive service has been interrupted"

[MudiLoodi]

This issue started suddenly; everything was working fine before. I’m using curl 8.16.0 with OneDrive client 2.5.6. I’ve tried forcing IPv4 and HTTP/1.1, but it still fails. At some point, I encounter the following error:

ERROR: Encountered a std.net.curl.CurlException:
  Error Message:    Failure when receiving data from the peer on handle 7FAA50000E50
  Calling Function: onedrive.OneDriveApi.uploadFragment
  Line number:      1003
Retrying the respective Microsoft Graph API call for Internal Thread ID: n2BulqjJSWKfzwpc (Timestamp: 2025-Sep-12 20:36:37) ...
Internet connectivity to Microsoft OneDrive service has been interrupted .. re-trying in the background
...
...

[abraunegg]

@MudiLoodi

Internet connectivity to Microsoft OneDrive service has been interrupted

Your system / the 'onedrive' process has lost Internet connectivity.

Restart any applicable 'onedrive' service and/or restart your system .. this is en environmental issue to your device where you are running the client from.

[MudiLoodi]

You’re correct. I ran a speed test, and for some reason, my upload speed is below 1 MB. However, when I connected via a mobile hotspot, the upload speed jumped to 60 MB, and syncing worked perfectly.