If you have activated brave Shields on outlook.office.com then the document preview (e.g. for PDF files) is not working anymore.
Error-Message: “Something went wrong when the document preview was being created. Please try again later.”
Exact URL: https://outlook.office.com/mail/
If I deactivate Shields it works fine.
Version 1.30.86 Chromium: 94.0.4606.61 (Official build) (64-Bit)