Nintex Workflow - CodeBinaryOperatorExpression

. NET security patch (KB 4457035) was installed into SharePoint servers due to this patch all the SharePoint workflows stop working.

https://support.microsoft.com/en-us/help/4457035/description-of-the-security-and-quality-rollup-for-net-framework-4-6-4

https://blogs.msdn.microsoft.com/dotnet/2018/09/11/net-framework-september-2018-security-and-quality-rollup/

Error Message:-

0x22FC SharePoint Foundation Workflow Infrastructure 72fs Unexpected RunWorkflow: Microsoft.SharePoint.SPException: System.CodeDom.CodeBinaryOperatorExpression is not marked as authorized in the application configuration file."

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The error suggest that System.CodeDom.CodeBinaryOperatorExpression is not in the authorized types. The type is already there and even if you include when it is missing, the error will not go away.

Solution :-

The solution is to add explicitly the namespace to the all web applications' web.config:

       

Reference :-

https://blogs.msdn.microsoft.com/rodneyviana/2018/09/13/after-installing-net-security-patches-to-address-cve-2018-8421-sharepoint-workflows-stop-working/

https://social.msdn.microsoft.com/Forums/en-US/149acc4c-2e61-4a3f-8e7e-6856b5c15128/nintex-workflow-2013-issue-soapserverserver-was-unable-to-process-request-failed-to-publish?forum=sharepointgeneral

https://social.technet.microsoft.com/Forums/en-US/05983f67-1c4b-4672-a781-9b3028048e18/sharepoint-2013-quotcollect-signatures-sharepoint-2010quot-workflow-quottype?forum=sharepointgeneral