Hello, I am just starting out developing so I am not the best, this is actually my first ever plugin. Currently it just crashes the server everytime with the error below, any help is appreciated! https://github.com/iRain5511/FirstPlugin/blob/master/src/iRain/Main.php Code: [19:04:00] [Server thread/INFO]: Loading iRain v1.0.0 Fatal error: Declaration of iRain\Main::onCommand(iRain\CommandSender $sender, pocketmine\command\Command $command, string $label, array $args): bool must be compatible with pocketmine\plugin\PluginBase::onCommand(pocketmine\command\CommandSender $sender, pocketmine\command\Command $command, string $label, array $args): bool in phar:///home/container/plugins/FirstPlugin_dev-22.phar/src/iRain/Main.php on line 38 [19:04:00] [Server thread/EMERGENCY]: An unrecoverable error has occurred and the server has crashed. Creating a crash dump [19:04:00] [Server thread/EMERGENCY]: Please upload the "/home/container/crashdumps/Sun_Aug_5-19.04.00-UTC_2018.log" file to the Crash Archive and submit the link to the Bug Reporting page. Give as much info as you can. Killed