Upload of a file does not work if the file is larger than about 10MB

[hegien]

Hello,
I have been using ondrive-upload for a long time to upload the backup of my Raspi to OneDrive. I split the backup into 2GB files and then upload them with "onedrive-uplader upload ..." This worked on December 14th. On December 27th I noticed for the first time that the upload was failing. The upload starts and then stops with the message:
"Could not upload file: received unexpected status code 401"
In a few attempts I have determined that the upload works as long as the file is not larger than 10MB.
Has Microsoft introduced any size restrictions for uploading via the app?