The specific error is:
Cache directory "/var/www/html/website/app/cache/dev" is not writable.
The mentioned folder has 777 permissions tough. Unhappy and frustrated I applied those permissions to the entire website folder
chmod -R 777 /var/www/html/website/
But still, I had no luck. I tried to delete the folder:
rm -rf app/dev
It recreates correctly the folder when I try to access the website but still, that error persists.
This website it's been migrated from another VPS so I even tried to
chown -R apache:apache /var/www/html/website/
reset the ownership but it was unsuccesful.
In the same VPS there are several virtual hosts running with zero problems. It's a CentOS 7. What am I missing?