This error occurs when the Raisers Edge Web Services Server has been updated while IIS is still running.

Run the REREGISTER.EXE utility on the Raisers Edge Web Services server.

If the error persists, recycle the app pools on the Raisers Edge Web Services server.  If you need assistance on recylcling the app pools, Please contact the appropriate software vendor or IT professional for assistance with this process or issue, which is beyond Blackbaud's scope of support.

Note: If The Raiser's Edge is hosted by Blackbaud, Click Chat with Support and reference this article.