TOTP-QR-Code not showing

Hello,

I’ve setup my mailcow server with a reverse proxy.

Now I have the problem that when I want to add a TOTP to my authenticator the qr code is not showing up.

How can I fix this?

This is my nginx config:

server {
  listen 80 default_server;
  server_name mailcow.example.com autodiscover.* autoconfig.*;
  return 301 https://$host$request_uri;
}
server {
  listen 443 ssl http2;
  server_name mailcow.example.com autodiscover.* autoconfig.*;

  ssl_certificate /opt/mailcow-dockerized/data/assets/ssl/cert.pem;
  ssl_certificate_key /opt/mailcow-dockerized/data/assets/ssl/key.pem;
  ssl_session_timeout 1d;
  ssl_session_cache shared:SSL:50m;
  ssl_session_tickets off;

  # See https://ssl-config.mozilla.org/#server=nginx for the latest ssl settings recommendations
  # An example config is given below
  ssl_protocols TLSv1.2;
  ssl_ciphers HIGH:!aNULL:!MD5:!SHA1:!kRSA;
  ssl_prefer_server_ciphers off;

  location /Microsoft-Server-ActiveSync {
    proxy_pass http://127.0.0.1:8080/Microsoft-Server-ActiveSync;
    proxy_set_header Host $http_host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_connect_timeout 75;
    proxy_send_timeout 3650;
    proxy_read_timeout 3650;
    proxy_buffers 64 512k; # Needed since the 2022-04 Update for SOGo
    client_body_buffer_size 512k;
    client_max_body_size 0;
  }

  location / {
    proxy_pass http://127.0.0.1:8080/;
    proxy_set_header Host $http_host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    client_max_body_size 0;
  # The following Proxy Buffers has to be set if you want to use SOGo after the 2022-04 (April 2022) Update
  # Otherwise a Login will fail like this: https://github.com/mailcow/mailcow-dockerized/issues/4537
    proxy_buffer_size 128k;
    proxy_buffers 64 512k;
    proxy_busy_buffers_size 512k;
  }
}

Here’s a picture of my described problem:

Thank you for your help.