I can`t create extensions

I can’t create an extension for twitch.
App for twitch are created without problems, but the extension does not work, when I click “get started” on the extension just go straight to the documentation https://dev.twitch.tv/docs/extensions/onboarding. I am a companion twitch, the information for payments is specified and confirmed, also in the mail came a letter that I can create the extension but when clicking on “get started” redirects to the documentation, and if you go for a direct link to create extensions, it says I have no rights to create.