I upgraded a site from 7.2 to 7.3.1 all seemed ok for a while, but then someone tried editing the site and we now see that a lot of the API url's are 404'ing so we cannot change to edit mode, use the file manager, etc...
A few sample url's that are broken:
/DesktopModules/internalservices/API/controlbar/ToggleUserMode /DesktopModules/internalservices/API/controlbar/RecycleApplicationPool
What could cause this? All was working well with 7.2 I am grateful for any suggestions!
In my case the System.Net.Http dll was wrong, I pulled a copy from a working 7.3.1 install and am back to normal.