ERR_NGROK_SHIP_INTEGRATION_CREDENTIAL_FIELD_UNSUPPORTED: Provider PROVIDERID has no credential field NAME - ngrok documentation

What does ERR_NGROK_SHIP_INTEGRATION_CREDENTIAL_FIELD_UNSUPPORTED mean?

ngrok returns ERR_NGROK_SHIP_INTEGRATION_CREDENTIAL_FIELD_UNSUPPORTED with this message:

Provider <PROVIDERID> has no credential field <NAME>. Allowed: <FIELDS>.

Where can I get more help with ERR_NGROK_SHIP_INTEGRATION_CREDENTIAL_FIELD_UNSUPPORTED?

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