The error commonly occurs if you have installed other PDF viewers, as they may interfere with Edge while opening PDF documents. Also, clearing the cache is important ...

There are times when Acrobat Reader DC fails to open a PDF file and displays the following error message: Adobe Acrobat Reader could not open PDF because it is either ...

If you're using a recent version of Windows, Microsoft's Edge browser will "helpfully" make itself your default PDF viewer. You might want to change that default ...