1981125 - SAP Afaria Self Service Portal (EUSSP) error "Server Error in '/self' Application. Operation could destabilize the runtime.".

After installing a new version of the Afaria Self Service Portal over an existing installation, the Self Service Portal cannot be browsed anymore and the below error is shown: 

Server Error in '/self' Application.

Operation could destabilize the runtime.

Description: An unhandled exception occurred during the execution of

the current web request. Please review the stack trace for more information

about the error and where it originated in the code.

Exception Details: System.Security.VerificationException: Operation could destabilize the runtime.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[VerificationException: Operation could destabilize the runtime.]

System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +17

 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +1155

System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&completedSynchronously) +305

• SAP Afaria 7 SP3
• SAP Afaria 7 SP4
• SAP Self Service Portal

SAP Afaria EUSSP EUSSP SAP Afaria Self Service Portal Self Service Portal SelfService Portal Operation could destabilize the runtime System.Security.VerificationException: Operation could destabilize the runtime. Server Error , KBA , MOB-AFA , Afaria , Problem