Delivered Parameter: mysql:host=localhost;dbname=ts3_ranksystem;charset=utf8mb4

Database Connection failed: SQLSTATE[HY000] [1045] ProxySQL Error: Access denied for user 'root'@'2a02:4780:bad:f00d::8' (using password: YES)

Check:
- You have already installed the Ranksystem? Run install.php first!
- Is the database reachable?
- You have installed all needed PHP extenstions? Have a look here for Windows or Linux?