KanBo Error: 403 (On-Premises)

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This article explains how to resolve the 403 Forbidden error that may occur during a KanBo on-premises installation. The issue is usually caused by an incorrect Client ID in the web.config file. This ID should match the app identifier registered in SharePoint.

If you are getting an error message like this in KanBo:

Check the KanBo log file for further information about it.

Security        ERROR | User authentication postback failed (cd68737c-faff-4398-a38c-3fe95a79df5b):
System.Net.WebException: The remote server returned an error: (403) Forbidden.

If the KanBo log file shows a 403 error:

  1. Check the Client ID in your web.config file. It is most likely incorrect.
    Your setup process created the client ID when you created the app identifier and received a result like this:
  1. You can also check SharePoint. Go to your Site Settings > Site App Permissions, and you will find the Client ID among the displayed IDs.

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