Operator 'ge' incompatible with operand types 'System.Nullable`1[[System.DateTime, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]' and 'System.String' at position 10.

Usually the error comes when there is a syntax error in the query we designed and dealing with date time filters in Microsoft Dynamic CRM.

I have explained the details in my blog here

A binary operator with incompatible types was detected. Found operand types 'Edm.DateTimeOffset' and 'Edm.String' for operator kind 'GreaterThanOrEqual'