Hmmmmmmm sometimes issues with SharePoint are like buses - earlier I found that could not open any word documents until installed Office 2010 SP2 32-bit but that is not why I am here :-( .
I am developing a new intranet for a client and am testing out a load of OOTB features to see which ones will best meet requirements we have defined, ahead of a live deployment. This led me to the Treeview widget to see if it will help with navigation. I enabled it on the top level home site which worked but showed way too much information for my users. Hence, I went over to a member of the team to see what there view looks like ( without SC admin / site owner privileges).
He got this error ( see below) - turns our everyone does now include me ( after a refresh) ! Ouch. Now this maybe due to our thin client environment . However this very strange. The only person who has ever changed the master page is me earlier this week when I enabled the breadcrumb but we have all been using this for days - have never touched the control shown in error. I will see if anybody in the IT team hasn't been fiddling with the farm but I suspect I am the cause of this disaster ......
Now, I need to remove the treeview feature via settings but I don't seem to be able to navigate to / _settings.
I can access the site via SharePoint designer
I created a replica site albeit unpopulated on my laptop so I can copy untouched master pages if needed.
I just need to get this fixed asap!!!!
- Edited by DanTheManXX 18 hours 21 minutes ago