I'm completely new in the envirronnment I'm using ton install Mantis but after several hours and many tries.. I think I need some help
So I've a synology NAS Uptodate and a docker image running of Mantis (the last one)
I installed mariadB on my synology using a synology package. I thnink (but not sure) it is version 10.4
So I started my Mantis installation and I'm locked under the control of the configuration
MyNAS/mantisbt/admin/install.php

According to what I understand :
So I think I dont need to create it ; the installation process will do it.Username (for Database) is the username the installation is going to create to allow the first access to the system
Password (for Database) will be the password linked to the user here above
Admin Username (to create Database if required) is my MariaDB root account to be able to create users and databases
Admin Password (to create Database if required)
So I'm sure my Admin username/Passsor is correct because I installed phpmyadmin and I can connect to it .
So I dont know what is wrong here except the fact that in the error message it is said : No such file or directory ?
Should I have an account on my sinology with the same name/Password as my root mariadb account ?
Thanks to all for your help
Arnaud