Hello, 

This error usually occurs when the required view (documents_kanban) is not available in the system.

Please check the following:

• Ensure that the Documents module is installed, as this view is part of it
• Verify that your module has the correct dependency defined in the __manifest__.py (e.g., 'documents')
• If already installed, try upgrading the Documents module and then reinstalling your custom module

This should resolve the missing view issue.

Hope this works for you! If you need any help implementing this or want a more optimized approach, feel free to reach out for further discussion

Regards,

Zehntech Technologies Inc.

santosh.sekwadia@zehntech.com