Cannot login with Bitwarden iPad Spp to self hosted vaultwarden

Hi,

my fresh installed vaultwarden runs on a lxc container in proxmox with most recent version. I cannlogin with my Master password from the web. My Vaultwarden instance is available using http://192.168.253.214:8000. installation is default, no reverse proxy, tls cert etc.

When I try setting up the ipad app of bitwarden, I choose self hosted and provide above URL. Whenever I provide the master pw then, it throws an error that I have to connect to the internet. Same behavior on my iphone.

Anything I’m missing?