#40 Nothing happens when changing the chance

Plugin Name: AdvancedOreGen Plugin Version: 1.6.47 Spigot: Paper git-paper-260 (1.18,2) issue description: If I want to increase the chance in the GUI, nothing happens. An error is displayed in the console. console error: https://paste.gg/p/anonymous/4cecd07a1419434885010f8601b67bf6