Please Help me

[Killian92]

[12:22:29] [Asynchronous Worker #0 thread/CRITICAL]: TypeError: "Return value of pocketmine\level\biome\Biome::getMinElevation() must be of the type int, null returned" (EXCEPTION) in "src/pocketmine/level/biome/Biome" at line 163
[12:22:29] [Asynchronous Worker #0 thread/DEBUG]: #0 plugins/MultiWorld_dev-159.phar/src/czechpmdevs/multiworld/generator/normal/NormalGenerator(186): pocketmine\level\biome\Biome->getMinElevation()
[12:22:29] [Asynchronous Worker #0 thread/DEBUG]: #1 src/pocketmine/level/generator/PopulationTask(108): czechpmdevs\multiworld\generator\normal\NormalGenerator->generateChunk(integer -36, integer 60)
[12:22:29] [Asynchronous Worker #0 thread/DEBUG]: #2 src/pocketmine/scheduler/AsyncTask(82): pocketmine\level\generator\PopulationTask->onRun()
[12:22:29] [Asynchronous Worker #0 thread/DEBUG]: #3 (): pocketmine\scheduler\AsyncTask->run()
[12:22:30] [Server thread/CRITICAL]: Could not execute asynchronous task PopulationTask: Task crashed
Multiworld Dev 159

I have the same error, but the developers can do nothing for the moment (more info is needed).

Look #83

[Inacio947]

Hello, how are you? Well I was wondering when I teleport to some worlds the plugin gives an error my server says "Internal Server error"