Users of Prosites can't cancel their subscription from within the account section in Prosites.
The problem is with the Stripe gateway, this is a major issue and needs to be fixed asap.
I have created a screencast of the bug so you can see it in action. https://youtu.be/LHB82rmzW5g
It is on a live site however you have PERMISSION to do WHATEVER you need to to fix this very serious issue. Any damage done by you testing on a live site is minimal compared to the actual issue which is setting my business back segnificantly. Support access is granted.
Thank you in advance.