Word - AutoSave issue with a specific OneDrive account

[sateliter-tm]

Hi guys,
I have 3 OneDrive accounts in my machine: personal account, work account and student account.
Whenever I work with a Word document using my student account AutoSave fails with "AUTOSAVE FAILED We have not been able to save your recent changes. Please save to a different file in order to keep all of your changes" if I hit the Save option manually, the file is saved without any issue. If I switch accounts and use my personal or my work account to edit a Word document with their respective OneDrive account, the Auto Save option works like a charme, so I think that my local installation is fine, but maybe some configuration in my Student OneDrive account is missing.

Any help would be very appreciated

[#2]

@sateliter-tm Under File>Account, does the Student OneDrive appear under Connected Services?  

If not, if you click on Add Service, can you add the Student OneDrive?

[#3]

@Doug_Robbins_Word_MVP 

Yes, it appeared as a Connected Services.

I executed Microsoft Office Online Repair from Control Panel and the AutoSave worked again
Thank you for your help