Been a long time since the last post…at least it feels like it.
Just finished troubleshooting an issue where a default page wouldn’t load. The correlation ID pointed to an Unexpected error in the SharePoint ULS logs stating:
unable to cast object of type microsoft.sharepoint.webcontrols.splinkbutton
The site settings page would load (modifying the URL manually) as would View All Site Content. However, clicking on any of the lists or libraries would throw the error. We initially thought this was an issue with the default.aspx page getting corrupted, as we could create a new blank web part page in SPD, place it in the root of the web, and it would load up okay.
What fixed this: IISRESET!
Again, the same lesson learned, all over again.
SharePoint troubleshooting steps: