Which of the following service catalogs are available OOTB as demo data? (Choose two.)

Users have been given Read/Write access to product support cases through criteria-based sharing rules. A user's profile only has the Read permission for cases.
What can the user expect regarding their ability to edit product support cases?

A user receives the generic "An internal server error has occurred" while interacting with a custom Lightning Component.
What should the developer do to ensure a more meaningful message?