Nginx – Prestashop 1.7 too many redirects on frontend shop

I keep getting ERR_TOO_MANY_REDIRECTS when trying to navigate to the frontend shop of a Prestashop 1.7 site. However it is fine when going to the admin backend.

Any suggestions would be helpful.

Site is running with Nginx, PHP-FPM7, MariaDB.

Nginx config file below:

upstream examplecoukbackend {
        server unix:/var/run/php-fcgi-examplecouk.sock;
}

server {
        listen 80;
        server_name example.co.uk;
        return 301 https://$server_name$request_uri;
}

server {
    listen 443 ssl;

    ssl_session_timeout 24h;
    ssl_session_cache shared:SSL:10m;
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    ssl_ciphers ECDH+AESGCM:ECDH+AES256:ECDH+AES128:DH+3DES:RSA+3DES:AES128-SHA:!ADH:!AECDH:!MD5;
    ssl_prefer_server_ciphers on;
    ssl_certificate /etc/letsencrypt/live/example.co.uk/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/example.co.uk/privkey.pem;

    server_name example.co.uk;
    root /var/www/vhosts/example.co.uk/htdocs; 
    access_log /var/www/vhosts/example.co.uk/access.log;
    error_log /var/www/vhosts/example.co.uk/error.log;

    index index.php index.html;

    location = /favicon.ico {
        log_not_found off;
        access_log off;
    }

    location = /robots.txt {
        auth_basic off;
        allow all;
        log_not_found off;
        access_log off;
    }

    # Deny all attempts to access hidden files such as .htaccess, .htpasswd, .DS_Store (Mac).
    location ~ /\. {
        deny all;
        access_log off;
        log_not_found off;
    }

    ##
    # Gzip Settings
    ##

    gzip on;
    gzip_disable "msie6";
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 1;
    gzip_buffers 16 8k;
    gzip_http_version 1.0;
    gzip_types application/json text/css application/javascript;

    rewrite ^/[a-zA-Z][a-zA-Z]/(index\.php.*)$ /$1 last;  #Remove language code when index.php is called directly
    rewrite ^/api/?(.*)$ /webservice/dispatcher.php?url=$1 last;
    rewrite ^/([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$1$2$3.jpg last;
    rewrite ^/([0-9])([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$2/$1$2$3$4.jpg last;
    rewrite ^/([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$2/$3/$1$2$3$4$5.jpg last;
    rewrite ^/([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$2/$3/$4/$1$2$3$4$5$6.jpg last;
    rewrite ^/([0-9])([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$2/$3/$4/$5/$1$2$3$4$5$6$7.jpg last;
    rewrite ^/([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$2/$3/$4/$5/$6/$1$2$3$4$5$6$7$8.jpg last;
    rewrite ^/([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$2/$3/$4/$5/$6/$7/$1$2$3$4$5$6$7$8$9.jpg last;
    rewrite ^/([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-]*)?(-[0-9]+)?/.+.jpg$ /img/p/$1/$2/$3/$4/$5/$6/$7/$8/$1$2$3$4$5$6$7$8$9$10.jpg last;
    rewrite ^/c/([0-9]+)(-[.*_a-zA-Z0-9-]*)(-[0-9]+)?/.+.jpg$ /img/c/$1$2$3.jpg last;
    rewrite ^/c/([a-zA-Z_-]+)(-[0-9]+)?/.+.jpg$ /img/c/$1$2.jpg last;

    location /admin/ {                           #Change this to your admin folder
        if (!-e $request_filename) {
            rewrite ^/.*$ /admin/index.php last; #Change this to your admin folder
        }
    }

    location / {
        if (!-e $request_filename) {
            rewrite ^/.*$ /index.php last;
        }
    }

    location ~ .php$ {
        fastcgi_split_path_info ^(.+.php)(/.*)$;
        try_files $uri =404;
        fastcgi_keep_conn on;
        include /etc/nginx/fastcgi_params;
        fastcgi_pass examplecoukbackend;  #Change this to your PHP-FPM location
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    }
}

Log file below, IPs and domain name generalised:

2017/01/08 21:58:00 [notice] 21867#21867: 1 "^/([0-9])(-[_a-zA-Z0-9-])?(-[0-9]+)?/.+.jpg$" does not match "/index.php", client: 0.0.0.0, server: example.co.uk, request: "GET /index.php HTTP/1.1", host: "example.co.uk"
2017/01/08 21:58:00 [notice] 21867#21867: 1 "^/([0-9])([0-9])(-[_a-zA-Z0-9-])?(-[0-9]+)?/.+.jpg$" does not match "/index.php", client: 0.0.0.0, server: example.co.uk, request: "GET /index.php HTTP/1.1", host: "example.co.uk"
2017/01/08 21:58:00 [notice] 21867#21867: 1 "^/([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-])?(-[0-9]+)?/.+.jpg$" does not match "/index.php", client: 0.0.0.0, server: example.co.uk, request: "GET /index.php HTTP/1.1", host: "example.co.uk"
2017/01/08 21:58:00 [notice] 21867#21867: 1 "^/([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-])?(-[0-9]+)?/.+.jpg$" does not match "/index.php", client: 0.0.0.0, server: example.co.uk, request: "GET /index.php HTTP/1.1", host: "example.co.uk"
2017/01/08 21:58:00 [notice] 21867#21867: 1 "^/([0-9])([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-])?(-[0-9]+)?/.+.jpg$" does not match "/index.php", client: 0.0.0.0, server: example.co.uk, request: "GET /index.php HTTP/1.1", host: "example.co.uk"
2017/01/08 21:58:00 [notice] 21867#21867: 1 "^/([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-])?(-[0-9]+)?/.+.jpg$" does not match "/index.php", client: 0.0.0.0, server: example.co.uk, request: "GET /index.php HTTP/1.1", host: "example.co.uk"
2017/01/08 21:58:00 [notice] 21867#21867: 1 "^/([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-])?(-[0-9]+)?/.+.jpg$" does not match "/index.php", client: 0.0.0.0, server: example.co.uk, request: "GET /index.php HTTP/1.1", host: "example.co.uk"
2017/01/08 21:58:00 [notice] 21867#21867: 1 "^/([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])([0-9])(-[_a-zA-Z0-9-])?(-[0-9]+)?/.+.jpg$" does not match "/index.php", client: 0.0.0.0, server: example.co.uk, request: "GET /index.php HTTP/1.1", host: "example.co.uk"
2017/01/08 21:58:00 [notice] 21867#21867: 1 "^/c/([0-9]+)(-[._a-zA-Z0-9-]*)(-[0-9]+)?/.+.jpg$" does not match "/index.php", client: 0.0.0.0, server: example.co.uk, request: "GET /index.php HTTP/1.1", host: "example.co.uk"
2017/01/08 21:58:00 [notice] 21867#21867: *1 "^/c/([a-zA-Z_-]+)(-[0-9]+)?/.+.jpg$" does not match "/index.php", client: 0.0.0.0, server: example.co.uk, request: "GET /index.php HTTP/1.1", host: "example.co.uk"