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    Nintex Knowledge Base

    Error "The expression prefix 'NFResources' was not recognized" when accessing Central Administration links

    Summary
    When trying to access the managment links in Central Administration, the following error might occur: "The expression prefix 'NFResources' was not recognized. Please correct the prefix or register the prefix in the section of configuration."

    Solution
    1. Navigate to: Central Administration > Application Management > Manage web applications
    2. Select the Web application you're using for Nintex Forms.
    3. Click on Manage Features from the ribbon.
    4. Deactivate (if active).
    5. Re-activate the "Nintex Forms 2010(2013)" feature.

    Note: This will trigger a web.config update that will recycle the application pool (something to be aware of if this is on your production environment).