Can not open pdf and jpeg files from a SharePoint site in Teams


Can not open pdf and jpeg files from an integrated SharePoint site in Teams desktop app on a MAC.
Error message: “This item might not exist or is no longer available”.
The files can be opened directly in SharePoint.

The files can be opened in Teams Web when using a browser and can be saved.
The issue don't exists on .docs and .ppt (Office 365) files.
The issue occurs to all users.
It was working before. The problem exists for about 2-3 months.
Regardless of the internet network, the same issue remains.
The issue also exists also in Windows computers.

macOS version: 10.15.6 (19G73).


Found the following Error in MS Teams diagnostic log:
2020-08-31T08:07:34.172Z Inf FileViewer: error callback from oneUp {"type":"error","isExpected":false,"error":{"code":"500","message":"The item may have been deleted, the item may have expired, or you may not have permission to view it. Contact the owner of the item for more information."},"conversationId":0}

There are many permissions to the SharePoint site. Please check the attachment.

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