Canvas page won't save. Ajax: error 200

[rosoccer]

I can't save my canvas page. 

I went copy text from another page. Edit, copy text, save. Won't save. I did nothing to the page. 

My assignment today is doing the same thing. 

I reloaded all the videos, and the assignment Google link. 

Press save, won't save. 

New tab, open the page. 

I am getting an AJAX: error 200. 

I am not a novice. What is going on?