Nintex Workflow publish error: System.CodeDom.CodeTypeReferenceExpression is not marked as authorized in the application configuration file

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When publishing the Nintex Workflow on SharePoint On-prem, we might get following error:

soap:ServerServer was unable to process request. ---> Failed to publish workflow: <Error><CompilerError Line="-1" Column="-1" Text="Type System.CodeDom.CodeTypeReferenceExpression is not marked as authorized in the application configuration file."



Solution:

As per the Microsoft Docs, below is the solution:


Workflow Foundation (WF) will only run workflows when all the dependent types and assemblies are authorized in the .NET config file (or added explicitly via code) under this tree:

<configuration>

<System.Workflow.ComponentModel.WorkflowCompiler>

<authorizedTypes>

<targetFx>

However, after the update, the following lines are necessary for SharePoint 2013 and beyond:


<authorizedType Assembly="System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" NameSpace="System.CodeDom" TypeName="CodeBinaryOperatorExpression" Authorized="True" />

<authorizedType Assembly="System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" NameSpace="System.CodeDom" TypeName="CodePrimitiveExpression" Authorized="True" />

<authorizedType Assembly="System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" NameSpace="System.CodeDom" TypeName="CodeMethodInvokeExpression" Authorized="True" />

<authorizedType Assembly="System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" NameSpace="System.CodeDom" TypeName="CodeMethodReferenceExpression" Authorized="True" />

<authorizedType Assembly="System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" NameSpace="System.CodeDom" TypeName="CodeFieldReferenceExpression" Authorized="True" />

<authorizedType Assembly="System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" NameSpace="System.CodeDom" TypeName="CodeThisReferenceExpression" Authorized="True" />

<authorizedType Assembly="System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" NameSpace="System.CodeDom" TypeName="CodePropertyReferenceExpression" Authorized="True" />

<authorizedType Assembly="System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" NameSpace="System.CodeDom" TypeName="CodeTypeReferenceExpression" Authorized="True" />

So above Lines need to be added on the Web application web.config file on all the WFE Servers. 

There are total 8 entries to be added, sometimes the 7 entries maybe present. So just adding the last 8th entry will fix the issue.

After updating the Web.config:


Now if you try to publish the Workflow:


Thank you.

Solution source:

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