[SOLVED] Unable to Access MySQL DB after changing root password with phpmyadmin

Hello,
That's exactly what we are telling you from the beginning.
As it's explained in the documentation and in our website (I already gave you the useful links), your database should be encoded in UTF8mb4, just like Babynus told you.
That's part of your mysql setup, even before installing ProjeQtOr on your webserver.
Then, the installation should be automatic, you should not have to change anything in the config files directly (concerning the encoding).