ERR_NGROK_SHIP_BUILD_CONFIG_PATH_BAD_START_OR_END: The FIELD value VALUE must not start or end with '/' - ngrok documentation

What does ERR_NGROK_SHIP_BUILD_CONFIG_PATH_BAD_START_OR_END mean?

ngrok returns ERR_NGROK_SHIP_BUILD_CONFIG_PATH_BAD_START_OR_END with this message:

The <FIELD> value <VALUE> must not start or end with '/'.

Where can I get more help with ERR_NGROK_SHIP_BUILD_CONFIG_PATH_BAD_START_OR_END?

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