ERR_NGROK_354

Message

Failed to bind <DOMAIN>. Nested subdomains of the ngrok base endpoint domain <ENDPOINT_DOMAIN> must be reserved first. Alternatively, try <SUGGESTION> instead.

Further help

If you're having trouble resolving this error, please reach out to support@ngrok.com.

Possible solutions

Reserve your subdomain in your ngrok account dashboard https://dashboard.ngrok.com/endpoints/domains before starting a tunnel using that subdomain.

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