So I've hosted my project and I was getting error that was messing up with app key. I managed to fix it. I took app key from env.example and placed it in .env "SomeRandomString" and I changed config/app.php
'cipher' => 'AES-256-CBC', to 'cipher' => 'AES-128-CBC',
Does this makes my site vulnerable more right now and should I change this immediately or it doesn't do anything with vulnerability of Laravel ?