Laravel giving 502 bad gateway in nginx - php

Question

I have reloaded my server configuration to match the one provided on Laravel. When I do php --ini I can see my PHP version is 7.0 so I made the alterations to use 7.0.
My server config looks like this:
server {
server_name exoscape.co.uk;
root /var/www/html/exoscape/public;
index index.php index.html index.htm;
location / {
try_files $uri $uri/ /index.php?$query_string;
}
location ~ \.php$ {
include fastcgi_params;
fastcgi_pass unix:/run/php/php7.0-fpm.sock;
}
location ~ /\.ht {
deny all;
}
listen [::]:443 ssl ipv6only=on; # managed by Certbot
listen 443 ssl; # managed by Certbot
ssl_certificate /etc/letsencrypt/live/exoscape.co.uk/fullchain.pem; # manag$
ssl_certificate_key /etc/letsencrypt/live/exoscape.co.uk/privkey.pem; # man$
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}
server {
if ($host = exoscape.co.uk) {
return 301 https://$host$request_uri;
} # managed by Certbot
listen 80;
listen [::]:80;
server_name exoscape.co.uk;
return 404; # managed by Certbot
}
I have tried to ensure that the dir is chmod correctly by doing:
sudo chown -R www-data:www-data /var/www/html/exoscape/
sudo chmod -R 755 /var/www/html/exoscape/
But I still receive 502 Bad Gateway when I visit my domain. I am using nginx/1.15.12. Any help would be appreciated.