When trying to “Add custom domain”, I’m getting “Hosting internal error. If the issue persists, contact Firebase Support” error message in the “Edit domain” popup.

This has been happening since at least the last Thursday – so for at least 4 days.

Firebase hosting status dashboard doesn’t show any ongoing issues.

I’ve tried deleting and registering the custom domain again several times, but it didn’t help.

I can successfully query my DNS provider using CLI and from web apps that provide network tools.

I don’t know how to proceed with this.