403 CSRF verification failed on mobile android browser only

Hey everyone, I fixed the error and here is the solution:

the nginx settings were missing:

location / {
    proxy_pass http://localhost:8000;
    proxy_set_header Host $http_host;
    proxy_redirect off;
    proxy_set_header X-Forwarded-For $remote_addr;
    proxy_set_header X-Forwarded-Proto $scheme;
    client_max_body_size 20m;
}