I'm trying to set blocks over a large area using async tasks but I keep getting one error with this. Code: [00:49:55] [Asynchronous Worker #0 thread/CRITICAL]: ErrorException: "Uninitialized string offset: 79872" (EXCEPTION) in "src/pocketmine/level/format/SubChunk" at line 106 [00:49:55] [Asynchronous Worker #0 thread/DEBUG]: #0 src/pocketmine/level/format/SubChunk(106): pocketmine\utils\Utils::errorExceptionHandler(integer 8, string Uninitialized string offset: 79872, string phar:///home/servers/tests/PocketMine-MP.phar/src/pocketmine/level/format/SubChunk.php, integer 106, array Array()) [00:49:55] [Asynchronous Worker #0 thread/DEBUG]: #1 src/pocketmine/level/format/Chunk(201): pocketmine\level\format\SubChunk->setBlock(integer 312, integer 0, integer 0, integer 169, NULL ) [00:49:55] [Asynchronous Worker #0 thread/DEBUG]: #2 plugins/HCFCore/src/hcf/road/task/BuildRoadTask(54): pocketmine\level\format\Chunk->setBlock(integer 312, integer 64, integer 0, integer 169) [00:49:55] [Asynchronous Worker #0 thread/DEBUG]: #3 src/pocketmine/scheduler/AsyncTask(75): hcf\road\task\BuildRoadTask->onRun() [00:49:55] [Asynchronous Worker #0 thread/DEBUG]: #4 (): pocketmine\scheduler\AsyncTask->run() Code I used: PHP: /** @var Chunk $chunk */ $chunk->setBlock(int, int, int, Block::SEA_LANTERN);