This Disabled my button links

It has taken me 3 days to troubleshoot why none of my links within posts/pages no longer worked. ADD MEDIA, ADD CATEGORIES, EDIT (permalinks), none of those editor links worked. After changing themes, which was not the problem, and after disabling all my plugins, this was the last one, and everything was enabled again. I re-activated all plug-ins one at a time, still buttons worked. This was the last one to re-activate, and the problem returned.