Modules.https documentation currently says "Note: This feature requires a Team or Enterprise subscription!"
It should say: "Note: This feature requires a Pro, Team, or Enterprise subscription."
(Be sure to remove the exclamation point - no need to yell)
A customer found this issue and thankfully asked if Pro would include before choosing not to buy a Pro plan. Would be good to do a search of all modules for the "requires a Team or Enterprise subscription" and update where needed.