ERR_NGROK_313
Message
Custom subdomains are a feature on ngrok's paid plans.
Failed to bind the custom subdomain SUBDOMAIN
for the account ACCOUNT
.
This account is on the PLAN
plan.
Upgrade to a paid plan at: https://dashboard.ngrok.com/billing/subscription
Further help
If you're having trouble resolving this error, please reach out to support@ngrok.com