エラーです。
[23:15:54] [Server thread/CRITICAL]: ErrorException: "array_rand(): Array is empty" (EXCEPTION) in "plugins/RegularlyMessage_v2.2.0.phar/src/regularlymessage/SendTask" at line 15
[23:15:54] [Server thread/DEBUG]: #0 (): pocketmine\utils\Utils::errorExceptionHandler(integer 2, string[28]...