I’ve had an ongoing problem where some users, when clicking the Edit Page button on a SharePoint 2010 wiki page, get the following error: Sys.WebForms.PageRequestManagerServerException: An unexpected error has occurred I found a couple blog posts about this suggesting a permissions issue (which made sense, as users in other groups could successfully edit pages): SP2010/Wiki … Continue reading SharePoint error when editing a wiki page: Sys.WebForms.PageRequestManagerServerException: An unexpected error has occurred