What i did / Steps to reproduce

In the sql.php file generated by the plugin in the web folder (to be placed on a custom web server), the $port parameter for specifying a custom SQL port is not used, but the var is defined on the user config part.
The line "$sql = new PDO("$driver:host=$hostname;dbname=$database", $username, $password);" is missing the ";port=$port".

The line should be:

$sql = new PDO("$driver:host=$hostname;port=$port;dbname=$database", $username, $password);

With this modification, the issue is solved.

Thanks !

Context

BlueMap Version:
Bluemap 3.20 - Pufferfish - Minecraft 1.20.4