I log onto odoo saas 5 and find I cant edit the website by clicking the buttons of EDIT, Promote, Content, Customize, and Help. They just don't work as usual. I go to the Forum, and find I CAN use those buttons. I return to the other pages, some can while some can't. After a while with some refreshing, most of the pages come back to the conditions where those buttons respond nothing. What happpened to my website? I did nothing to it except I opened some other instances. Pls help me out of this. 

The other thing I noticed is that I can't upload images from local disk or from a url. It only accepts what have been uploaded to the system. No message pops out just nothing.

update: I edited some pages this afternoon, now it seems the homepage works well with those buttons but the other pages not. Can anyone tell me how to figure out what happened behind?

Update Aug 8 2015: I cleaned the caches, TRUNed OFF the protection from Cloudflare and now the website can be edited. But from the Content button, New product, New blog etc are still not there except New Page.  Aften I tunred on Cloudflare, it can't be edited again.