ERR_NGROK_1204: You can't delete your payment method while you have an active subscription - ngrok documentation

What does ERR_NGROK_1204 mean?

ngrok returns ERR_NGROK_1204 with this message:

You can't delete your payment method while you have an active subscription.

Where can I get more help with ERR_NGROK_1204?

Email support@ngrok.com and include the error code.