Hey @janik.driehaus I notice in a few of your examples you’re mentioning php -S 127.0.0.1:3000 index.php - be sure that you’re invoking php -S 127.0.0.1:3000 public/index.php from the app directory. This appears to be the issue in your final example.
In the second-to-last example, can you confirm you have a .env file present in the app directory?