This error appeared after the virtual machine restarted, but before that, the CA system was working properly.
Access denied for user 'root'@'localhost' in /var/www/html/providence/app/lib/Db/mysqli.php line 153:
In mysqli_real_connect() in mysqli line 153
At Db_mysqli->connect() in Db line 135
At Db->connect() in Db line 102
At Db->__construct() in index line 42
I dont change any thing.