I'm currently working with an associate who is unable to add the Content Editor web part to a specific SharePoint page in the environment. The specific site that the user needs to do this on is a sub-site, so I made sure to stop inheriting permissions from parent site, and add the user with design permissions to the specific sub-site permissions list. I made sure that the user has the design permission to do so, since that is the permission that allows a user to Add and Customize Pages, but they are still unable to do so. Is there anything I am missing in the process?
The exact error message reads: "A Web Part or Web Form Control on this Page cannot be displayed or imported. You don't have Add and Customize Pages permissions required to perform this action."