Hi @mary,
Good day and thank you for posting in Microsoft Q&A Forum.
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Regarding to your description, could you please share a few more details?
- May I know that how you are trying to access the file? For example, are you accessing it via the Files tab in a Teams channel,
or is it a file that was shared directly in a chat?
- May I know with other browsers, does the same error is still persist? Could you please share screenshot showing the error message and the page you’re redirected to that doesn’t work properly?
- About the error message you mentioned, based on my research, some articles suggest that allowing third-party cookies may resolve this issue. I’m not sure if you’ve tried adjusting this setting yet. If not, could you please search online for guidance on enabling third-party cookies or adjusting privacy restrictions based on your current browser version?
- For the files that were shared with you, could you kindly ask the file owner to check and share your sharing permissions?
Thank you for your time, I'm looking forward to your response.
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