'Add Document' Error

We have a custom plugin, where we force our users to use each time they want to create a document.  There is a link to ‘Add document’ which normally brings up a list of available templates.  But some users are receiving an error message as soon as the ‘Add document’ link is clicked.  The error message is:

System.Data.SqlClient.SqlException: You don't have the required permission. You need at least the '{0}' permission on the '{1}'.params[{View}, {Template}]

Can you confirm what the issue might be?