In Canvas, I recently copied over a course from another course. I hit the edit button on a page in the newly created course to edit content (see screenshot #1 in attachment) and when I click into the edit area the content disappears except for the page title (see screenshot #2 in attachment) - the entire window with the functions to edit and all my content disappears. 

This is happening to various pages within two of my Canvas courses. I have tried various browsers, different computers, done google searches and it says to clear cache and turn off add ons which I have done, but nothing fixes it, and I have tried incognito mode. I have 2 classes starting on Monday so this is incredibly URGENT.

See attachment for screenshots showing the issue.

Thank you!!