18.08 23:39:18 [Server] Server thread/EMERGENCY Please upload the "/CrashDump_Tue_Aug_18-23.39.18-EDT_2015.log" file to the Crash Archive and submit the link to the Bug Reporting page. Give as much info as you can.
18.08 23:39:18 [Server] Server thread/EMERGENCY An unrecoverable error has occurred and the server has crashed. Creating a crash dump
18.08 23:39:18 [Server] INFO Fatal error: Call to a member function hasPermission() on null in phar:///PocketMine-MP_1.5.phar/src/pocketmine/Player__64bit.php on line 439