17/12/2012 by Nitesh

Solution – An unhandled exception occured in Silverlight Application in SharePoint 2010


While working with SharePoint sites, we have very often created Document Libraries and Lists using the “More Options” feature present in the “Site Actions” menu on top left. While working on one of my SharePoint sites today, I started facing a weird issues all of a sudden. The site did not allow me creating any new item on one of my sub sites and an error message as “An unhandled exception occured in Silverlight Application” as in screenshot below. moss-error

I rebooted by PC, cleared cache, cookies and other things but all in vain.  I remember creating a new library few months back and had not touched it since then. I fiddled across the Central admin and below is the solution to the same –

  • Go to Central Administrationmoss-1
  • Go to Application Management > Manage Web Applicationmoss-3
  • Select the SharePoint Site Collection where you are facing the issue and Click General Settings on the ribbonmoss-5
  • Set Web Page Security Validation to “On” and save the changes.moss-6
  • Refresh the SharePoint site page and try adding one now.

Hope you like this post. Cheers!