Troubleshooting
invalid_hostname
That is not a valid hostname.
HTTP 422Fix is on your sideDo not retry unchanged
What it means
The value is not a hostname we can serve. We accept a fully qualified name like careers.acme.com, including internationalised names.
Why it happens
- It carries a scheme, path or port:
https://careers.acme.com/. - It is a wildcard (
*.acme.com) or an IP address. - It has an empty label, a label over 63 characters, or characters not allowed in DNS.
- For
whitelabel_host: the host is already used by another app.
What to do
- Send just the name: lowercase, no scheme, no trailing dot or slash.
- Strip what your customer typed with a URL parser before sending it.
error.messagesays which rule failed.
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