ERR_NGROK_SHIP_INTEGRATION_REVOCATION_UNAVAILABLE: PROVIDER did not answer the revocation request: REASON - ngrok documentation

What does ERR_NGROK_SHIP_INTEGRATION_REVOCATION_UNAVAILABLE mean?

ngrok returns ERR_NGROK_SHIP_INTEGRATION_REVOCATION_UNAVAILABLE with this message:

<PROVIDER> did not answer the revocation request: <REASON>

Where can I get more help with ERR_NGROK_SHIP_INTEGRATION_REVOCATION_UNAVAILABLE?

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