How to: troubleshoot Nintex workflow publication issues

I just started working with Nintex workflow and on my first day, I ran into this error message:

“Server was unable to process request —> Failed to publish workflow: (…)”

At the end of the descriptive error message, I was given the exact cause of the error. A type that was being used by the Nintex workflow, had not been registered as authorized in the application configuration file.

The solution is really simple. You need to navigate to your application’s folder in the wwwroot\wss\VirtualDirectories\portNumber (or, whichever is the correct folder for you), open up the web.config and scroll down to the list of <authorizedType Assembly> stuff.

In there, add the following:

<authorizedType Assembly=”mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089″ Namespace=”System.Collections.Generic” TypeName=”List`1″ Authorized=”True” />

Fixed.

Solution by Johan Olivier, here. By the way, love the “ΕΛΛΑΣ” cap Johan!