Help setting up Nginx proxy addon to access a local machine

Hello, I need to access remotely to one of my machines
which has the local IP address 192.168.1.119. When connected to the same wifi network I can correctly access http://192.168.1.119.

I have home assistant OS installed on a mini pc with local ip address 192.168.1.143 and I connect to it remotely using Nabu casa.

In home assistant I have set up Nginx proxy manager addon, followed the instructions (I installed maria db etc…)

On my router I set up port forwarding:
port 443 from all clients to 192.168.1.143/433
port 80 from all clients to 192.168.1.143/80

Then in the Nginx manager web UI I set up a new proxy host with the parameters:
http
192.168.1.119
port 80

This setup is not working, when I try to open the proxy host I get an error.

Furthermore, I’m not able to open the Nginx manager web UI when I’m not connected to my home wifi.

What am I doing wrong?