This may occur as a result of system changes, such as a datacenter move, or because of other issues with the PluginService.
  • Confirm that the PluginService URL in the Plug-in options window is correct
  • Verify that there are no errors on the testconfig page http://<yourdomain>/testconfig.aspx 
  • If you host the Blackbaud NetCommunity web server - confirm the Blackbaud NetCommunity service is running by checking the event viewer for errors. If errors are occurring that relate to the Blackbaud NetCommunity services, try restarting Blackbaud NetCommunity service on the server

If the issue is still unresolved, Click Chat with Support and reference this article.