Mine reset task

[Gezou]

[19:15:30] [Asynchronous Worker #0 thread/CRITICAL]: ErrorException: "Undefined offset: 0" (EXCEPTION) in "plugins/MineReset.phar/src/falkirks/minereset/task/ResetTask" at line 58

[19:15:30] [Asynchronous Worker #0 thread/CRITICAL]: #0 plugins/MineReset.phar/src/falkirks/minereset/task/ResetTask(58): pocketmine\utils\Utils::errorExceptionHandler(integer 8, string[19] Undefined offset: 0, string[86] phar:///home/gs-41126/plugins/MineReset.phar/src/falkirks/minereset/task/ResetTa, integer 58, array[7])

[19:15:30] [Asynchronous Worker #0 thread/CRITICAL]: #1 pmsrc/src/pocketmine/scheduler/AsyncTask(85): falkirks\minereset\task\ResetTask->onRun()

[19:15:30] [Asynchronous Worker #0 thread/CRITICAL]: #2 (): pocketmine\scheduler\AsyncTask->run()

[19:15:30] [Server thread/CRITICAL]: Could not execute asynchronous task ResetTask: Task crashed