Hello everyone, i think i have found another solution.
In my case following the guide didn’t help me.
To solve the bug i had to verify my domain without the www. prefix! In the chatgpt “add website” just insert yourdomain.yourextension instead of www.something.somethingelse.
In my case i first canceled all verified domains, then added my domain as promptengine.xyz instead of www.promptengine.xyz. After that i added the TXT record as @ in the DNS with the OpenAi key. From that moment everything worked perfectly and i was able to verify the domain and toggle visibility.
In fact if you take a closer look at the “example” OpenAi provides in the field box (when you try to add a website) it only contains “openai.com”.
Hope this helps!