При редиректе с HTTP на HTTPS возникает ошибка, в чем дело??

Добрый вечер.
Столкнулся с проблемой: надо сделать редирект с http на https, сделал следующим методом:

listen 80;
server_name *.universal-chat.net;
return 301 $server_name$request_uri;

Имеется домен universal-chat.net и api.universal-chat.net
Редирект с universal-chat.net на https://universal-chat.net проходит нормально.
А редирект api.universal-chat.net на https://api.universal-chat.net происходит с костылями.
Результат редиректа: api.universal-chat.net/api.universal-chat.net/api....
В чем может быть дело?
Весь конфиг:

user www-data;
worker_processes 4;

error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

worker_rlimit_nofile 150000;

events {
    worker_connections 8000;
    multi_accept on;
    use epoll;
}

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    log_format main '$remote_addr — $remote_user [$time_local] "$request" '
        '$status $body_bytes_sent "$http_referer" '
        '"$http_user_agent" "$http_x_forwarded_for"';

    access_log /var/log/nginx/access.log main;

    gzip off;
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    reset_timedout_connection on;
    client_body_buffer_size 128k;

    server {
        listen 80;
        server_name 127.0.0.1;
        root /var/www/html;
        index index.html index.php;

        location ~* \.php$ {
            try_files $uri = 404;
            fastcgi_split_path_info ^(.+\.php)(/.+)$;
            fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
            fastcgi_send_timeout 180s;
            fastcgi_read_timeout 180s;
            fastcgi_index index.php;
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            include fastcgi_params;
        }
    }
    server {
        listen 80;
        server_name universal-chat.net *.universal-chat.net;
        return 301 https://$host$request_uri;
    }
    server {
        listen 443 ssl;
        server_name universal-chat.net www.universal-chat.net;
        root /var/www/html/universal_chat;
        index index.html index.php;

        ssl_protocols TLSv1.1 TLSv1.2;
        ssl_certificate "/etc/letsencrypt/live/universal-chat.net/cert.pem";
        ssl_certificate_key "/etc/letsencrypt/live/universal-chat.net/privkey.pem";

        location ~* \.php$ {
            try_files $uri = 404;
            fastcgi_split_path_info ^(.+\.php)(/.+)$;
            fastcgi_pass unix:/var/run/php/php7.1-fpm.sock;
            fastcgi_send_timeout 180s;
            fastcgi_read_timeout 180s;
            fastcgi_index index.php;
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            include fastcgi_params;
        }
        location /api/ {
            deny all;
        }
    }
    server {
        listen 443 ssl;
        server_name api.universal-chat.net;
        root /var/www/html/universal_chat/api;
        index index.php;

        ssl_protocols TLSv1.1 TLSv1.2;
        ssl_certificate "/etc/letsencrypt/live/api.universal-chat.net/cert.pem";
        ssl_certificate_key "/etc/letsencrypt/live/api.universal-chat.net/privkey.pem";

        location ~* \.php$ {
            try_files $uri = 404;
            fastcgi_split_path_info ^(.+\.php)(/.+)$;
            fastcgi_pass unix:/var/run/php/php7.1-fpm.sock;
            fastcgi_send_timeout 180s;
            fastcgi_read_timeout 180s;
            fastcgi_index index.php;
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            include fastcgi_params;
        }
        location ~* ^(methods|includes) {
            deny all;
        }
    }
}