I have a user that is trying to edit a page and use
Insert > Upload File through the ribbon to add a file download link to the page. Once they select the file and click "OK" they are getting a Request Access error page in the dialog. I've tried granting Full Control permissions (as a test), but this did not resolve the error.
I've checked and both the designated document library and page are inheriting permissions from the Site Collection, as well as with another User with matching permissions (who was able to properly upload the file).
What would cause this behavior other than a permissions issue?