Novu Studio not working

I tried following the nextjs getting started guide but after I have started the Novu Studio by running npx novu@latest init --secret-key=xxx the web app only shows "Waiting for you to start the application" and in the console I can see, that the health check route was successfully accessed GET /api/novu?action=health-check 200 in 645ms and also the novu cli correctly lists the api endpoint. I also made sure that the env variable is correctly set. What else can I do? Using the "@novu/framework": "2.0.0-canary.5", and novu@latest === 2.0.0-canary.8 Node Version v20.15.1