We upgraded from SharePoint 2010 to 2013. Most list forms, the ones from out of the box lists were corrupted so when we click on Add New Item or View Item we get an error. Sometimes it says list does not exist, sometimes it says "web parts page error" and so on. Also all customized list forms got corrupted as well.
I need to know if there is a fix for that because when we tried to revert to the original default we did not find those forms in the report. We tried to revert the list views to the default but that also didn't work.
Any advice is much appreciated.
