What could cause a user to see an insufficient access message when accessing the planner?

The correct response highlights that insufficient access messages often stem from permission settings within the application. In this case, if a user does not have the appropriate permissions to the Schedule and Assignment Objects, they will not be able to access the planner effectively. Access to these objects is crucial since they control what a user can see and do when using the planning features. If the access rights are not granted, the system recognizes this and responds with an insufficient access message, preventing the user from proceeding.

Options such as insufficient device memory, outdated browsers, or incorrect time zone settings do not typically relate to permission issues. While these factors might affect a user’s experience in other ways, they wouldn't specifically generate an insufficient access message tied to application security and user rights. Therefore, the focus on access levels clearly identifies the critical role of permissions in application functionality.