ERR_NGROK_SHIP_POOL_EXECUTION_ROLE_ARN_INVALID: The 'execution_role_arn' value is not an IAM role ARN: REASON - ngrok documentation

What does ERR_NGROK_SHIP_POOL_EXECUTION_ROLE_ARN_INVALID mean?

ngrok returns ERR_NGROK_SHIP_POOL_EXECUTION_ROLE_ARN_INVALID with this message:

The 'execution_role_arn' value is not an IAM role ARN: <REASON>

Where can I get more help with ERR_NGROK_SHIP_POOL_EXECUTION_ROLE_ARN_INVALID?

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