Scope

Sorry, you don't have the permission to view this page

Summary
The reason for this error is that the user performing the action, does not have the required or sufficient permissions. 

Solution
A user with the Customer Support + Tech Support  role is unable to cancel a subscription from the Subscription Index page and receives the error:

With the roles of Customer Support and Tech Support, the user would not be able to cancel the subscription from the subscription index page.

They would have to open up the required subscription and cancel it by using the option below: 

If you face the issue with a user with different roles, it is most likely that they do not have sufficient permissions. For any clarifications, contact us at support@chargebee.com