hi @Tor-Saxberg the OpenAI compatible URL may not contain /chat/completions it must be the main API URL as /chat/completions is added by the system automatically.
Could you check Developer tools - Network for issues when you run the verification?
Help > Toggle Developer Tools > Network tab
You may see with your current configuration: /chat/completions/chat/completions with error. Therefore remove /chat/completions from your API path.