You never answered the direct question about whether you have any other extensions installed.
Try disabling all of your extensions, all of them, and then trying to access ChatGPT directly from the OpenAI interface.
If you still cannot get functionality from ChatGPT when no extensions are active, then your problem is with ChatGPT.
If you can access ChatGPT directly, when no extensions are active, then one of those extensions (or a conflict between a few of them) are the reason. If so, see: The Greatly Simplified Explanation of Conflicts