Can not host nuxt app in local network

Hey, I am trying to host my nuxt app in my local network to test it on mobile devices. I run

npm run dev -- --host

npm run dev -- --host

. Nuxt acts like the --host argument is not there. I do not get the QR-Code like usual and it still tells me "use --host to expose"

Can not host nuxt app in local network - Nuxt