Cloudflare tunnel not working with passbolt

Hi everyone!
So, I am having some problems securing my passbolt installation and accessing it through Cloudflare Tunnels.

Essentially when I try to log into my Passbolt instance (which is hosted on a Raspberry inside a Docker container…) I get 2 different results:

  • if I access locally inside my network it works fine
  • if I try outside through the tunnel it shows a blank page (the HTML is there, but it seems to be referencing to a local IP, like 10.0.x.x inside the source)

Other services are working tho, like portainer and homebridge for example. The same happens if I try to spin up an Nginx container.

What can I do guys? Really need some help here