Most like the webhooks got deleted on your site. Check the “Setting Up the Stripe Webhooks” section from the following documentation and make sure the webhooks are setup:
You may need to delete, empty the cached, then re-create the webhooks. Try a test after that.
Also, enable the debug logging feature so you can see if the plugin is receiving the notification from Stripe after a subscription is charged:
Using the Debug Log to Solve Transaction Related Issues on a Site