PS On your Mac, hold down the Option key while you do Finder > Go and select Library. See if you have a folder called Mobile Documents, and inside that one for Pages. That is where copies of your iCloud docs are kept on your machine if it is set up correctly. If you never installed the Pages app, I don't know if it will be there, but worth checking to see if the docs you want might be available locally.
Also did you ever download a copy of your docs to your own hard drive from iCloud? If so, it may be there somewhere and the Pages app could open them if you installed it.
Same issue. Pages on iPad is not synching with iCloud. When I log into iCould, I get the loop as well. Same for Keynote and Numbers.
When I open my iWork apps using my Macbook Air and click on iCloud, I also cannot download and view my documents. It just has "waiting" status and nothing happens.
My wife's account doesn't have this problem, though...
I called them and they are aware of the problem. It is not on your end. What is really lousy is that this is no minor glitch. iCloud is effectively not working for all iworks users so you would think the apple would notice folks with icloud accounts. Apple does not do that. Bad publicity bad for sales. So users spend time trying to figure out if the problem is on their end. They had to bump me up to a senior person before acknowledging they had a problem. If I called my cable company even the lowest level tech would be aware of the problem.