After the install of dotnet agent the application UI is encountering error message when certain option is selected. there are other options that are working fine. It seems like option that is encountering issue belongs to DotNet App Remoting calls. If dotnet agent is removed, the UI error does not occur. POP up error is as follows:
"Error: Error communicating between Web Service and Engine. Is Engine running?
Type System.Runtime.Remoting.ObjRef and the types derived from it (such as System.Runtime.Remoting.ObjRef) are not permitted to be deserialized at this security level."
New agent fix resolved the issue.