ERR_NGROK_4412: You may not invite users to the account with higher permissions than your own - ngrok documentation

What does ERR_NGROK_4412 mean?

ngrok returns ERR_NGROK_4412 with this message:

You may not invite users to the account with higher permissions than your own.

Where can I get more help with ERR_NGROK_4412?

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