AADSTS50058: A silent sign-in request was sent but none of the currently signed-in user(s) match the requested login hint.
You are seeing this error because you attempted to open the PDF editor in a browser that is currently logged into a different M365 tenant.
There are two options for this scenario.
Chrome… menuMore ToolsClear browsing dataLast 24 hoursClear Data
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Open in Incognito browser - this will open PDF Editor with a clean session to authenticate properly.