Hi @bakiabakianyor !
This issue seems to have appeared several times before (e.g. see here and here), but it’s in general user-specific. Some users have mentioned that it’s connected to VPN, if you are using VPN, try connecting/disconnecting, or disconnecting entirely. For some VPN providers, Firefox and Chrome originating requests are treated differently.
If you still get an error, then do as the message says, contact https://help.openai.com/ via the little chat option in the bottom-right.