ERR_TOO_MANY_REDIRECTS using Nginx and Application load balancer

I have set up an ALB on AWS with a certificate to redirect traffic over https, in my target group I have a Nginx to do a proxypass with my target instances.

Currently I have a CAS 4.0.1 application deployed in one instance, when I use the IP it works perfectly, but behind nginx I get ERR_TOO_MANY_REDIRECTS.

My Nginx has the following configuration:

server {
    listen 80;
    proxy_set_header X-Real-IP $remote_addr;
    absolute_redirect off;
    if ($http_x_forwarded_proto != 'https'){
           return 301 https://$host$request_uri;
    }
    server_name www.mydomain.ml;

 
location /cas {
            proxy_set_header Host $host;
            proxy_pass http://10.0.1.23:4040/cas/$1;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Server $host;
    }

Is there a line that fix my issue?