I am having the same problem. It is not related to file type submissions (they all do Word uploads which work fine in the several years I've now used Canvas). My Docviewer editing menu seems to have disappeared, at least according to my academic tech team, because I set the assignment to be "peer review"ed. Does this make sense, i.e. is Docviewer editing disabled when assignments are set to "peer review"? If so, this seems counterintuitive to disable tools that would allow closer textual scrutiny from both instructors and students. Please, help, if you or anyone can!
Casey Golomski
University of New Hampshire
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