java2nukkit world converter 3.0.0

An error has occurred while converting the world!
java.lang.IllegalStateException: Unexpected chunk section version 7 with target type NUKKIT
at br.com.gamemods.j2nwc.internal.NukkitChunkSection.toNbt(NukkitChunk.kt:49)
at br.com.gamemods.j2nwc.internal.NukkitChunk.toNbt(NukkitChunk.kt:129)
at br.com.gamemods.j2nwc.internal.RegionFileConverter.toNukkit(RegionFileConverter.kt:40)
at br.com.gamemods.j2nwc.internal.RegionFileConverter.convertRegionFile(RegionFileConverter.kt:19)
at br.com.gamemods.j2nwc.WorldConverter.convert(WorldConverter.kt:108)
at br.com.gamemods.j2nwc.WorldConverterCLI.main(WorldConverterCLI.kt:107)
The world conversion has failed

I tried converting an already made mape from Java and gave me an error could it be because everything around it was just empty.

Does not work for me. Trying to convert my spigot world throws me an error concerning the NBT converter or somthing.

Does not convert larger maps than 4k 4k or 5k. Was not able to convert my current spigot survival map to Bedrock... sad!