Unable to connect to OneDrive. Please try uploading again. Teams error message when uploading photos

[LegalCEO]

We use Teams to communicate within the company. About 50% of the time when I try to drag and drop or click the paperclip to send a needed photo or screenshot to the team, I get a message, "Unable to connect to OneDrive. Please try uploading again." None of the solutions I see online seems to solve the problem. I have Microsoft Teams Version (the currently latest version) on a Mac. I used Skype for years without any of these problems. I have a paid OneDrive account with plenty of storage

[#2]

@LegalCEO 

Since the community has not yet responded to your post, you might want to seek assistance with other resources that are focused on tech support:

• Ask your IT manager to open a support case or call Microsoft using the support line you were given.  Other options for business subscription admins are listed here:

Get support | Microsoft Docs

https://support.serviceshub.microsoft.com/supportforbusiness/create

• Additional tech support is available at support.microsoft.com or Answers.microsoft.com, where authorized Microsoft agents are available to trouble an issue until it’s resolved.

[#3]

@LegalCEO 

Go here...and READ...
https://docs.microsoft.com/en-us/microsoftteams/troubleshoot/files/cannot-upload-files-or-access-one...

...then run this...
https://aka.ms/TeamsUploadFilesInChat

...from there you will be able to determine why it is being blocked.

In MY case, it was because the end-user was NOT the owner of their own ONEDRIVE account.  The user was a returning employee, and another admin switched owner rights so the prior manager can have access to their files, rather than simply adding read privileges.

The above link helped me trace the issue and credit goes to Prathit Bhandari from the MS support team for helping me walk/talk through the issue!  :)