I get this error when connect to TFS from VisualStudio 2010. The message says
“The team project you are trying to connect to have no SharePoint associated with it. Any missing tier will be disabled from editing and greyed out”
The solution: Clear cache and re-connect to tfs.
Open file in location and delete some files with <GUID>_http format
C: \ Users \ <UserName> \ AppData \ Local \ Microsoft \ Team Foundation \ 3.0 \ Cache \ <GUID>_http
Hope this help.