Sharepoint 2013 Workflow timer job

Question

Hello all, I have a strange issue with workflow timer job which stay to running for a long time despite it should be executed every five minutes. I had a look into the logs and found multiple occurence of the following errors :
RunWorkflow: Microsoft.SharePoint.SPException: <Error><CompilerError Line="-1" Column="-1" Text="Type System.CodeDom.CodeBinaryOperatorExpression is not marked as authorized in the application configuration file." /><CompilerError Line="0" Column="0" Text="Activity 'ID5' validation failed: Property "Condition" has invalid value. Condition expression is invalid. The condition expression can not be null." /></Error>

Microsoft.SharePoint.SPException: <Error><CompilerError Line="-1" Column="-1" Text="Type System.CodeDom.CodeBinaryOperatorExpression is not marked as authorized in the application configuration file." /><CompilerError Line="0" Column="0" Text="Activity 'ID5' validation failed: Property "Condition" has invalid value. Condition expression is invalid. The condition expression can not be null." /></Error>
I already applied the workaround in config.web for all web application but it's not related to web application, it's related to owstimer. how can i solve that ?
Thanks in advance for your help.
Olivier

Answer 1

I'm guessing you've restarted timer svc and IISreset since making the web config change?