Symptoms

I have 3 CRM SmartObjects that are not working properly. When I am on a form using one of the pickers, I will get these error messages below.
“An unhandled Microsoft .NET Framework exception occurred in w3wp.exe p1124].”
“An unexpected error occurred while attempting to execute a server-side operation.”
 

Diagnoses

The errors were caused by selecting all properties in the filter properties.
 

Resolution

We were able to resolve the issue by limiting filter properties of the CRM SmartObject configured on the picker control only the one needed.