We have SharePoint 2013 installed at my company. I maintain it. I added documents to a library months ago and these documents have always shown up in the views I created for them. But recently, the documents are not displaying and I cannot figure out why. I have not changed any of the site settings recently. The add a new document link disappeared also. If I go to the library tab and click on "Open with Explorer" the documents show up there. So I know they exist.
I checked the SharePoint 2013 site on another computer and the documents do not show up in the SharePoint views there either. I usually use IE 10 to access SharePoint, but I checked this with Firefox, same thing there. No documents display in any of the views.
I also maintain a few SharePoint 2010 sites. All the documents display in the views on this site. I've searched this StackExchange site and the internet in general and found nothing related to this error.
UPDATE: May 6, 2014
I created a new site today under the same site collection and discovered more problems. In addition to not being able to see documents in the views, I also cannot edit links (both top link bar and quick launch), I cannot copy a permissions set to create a new one and best of all, I cannot edit any pages anywhere, new or existing.
UPDATE: May 12, 2014
I noticed around the same time the documents disappeared from my views that I also cannot add users to groups in SP 2013. What happens is that the people picker does not display in the pop up window. I can remove any user.
I created a new Site Collection using the 2010 look and feel, and I can add and remove users fine there. Any chance this is related to the problems with the library views?
Can anyone point me in the right direction? Any assistance would be greatly appreciated.