[12:04:31 ERROR]: No key size in MapLike[{extra_size:2,min_size:1,type:"minecraft:column_placer"}]
[12:04:31 ERROR]: Exception loading structure piece with id minecraft:jigsaw
java.lang.IllegalStateException: Invalid pool element found
        at net.minecraft.world.level.levelgen.structure.PoolElementStructurePiece.lambda$new$0(PoolElementStructurePiece.java:54) ~[?:?]
        at java.util.Optional.orElseThrow(Optional.java:403) ~[?:?]
        at net.minecraft.world.level.levelgen.structure.PoolElementStructurePiece.<init>(PoolElementStructurePiece.java:54) ~[?:?]
        at net.minecraft.world.level.levelgen.feature.StructureFeature.loadStaticStart(StructureFeature.java:129) ~[patched_1.17.1.jar:git-Paper-131]
        at net.minecraft.world.level.chunk.storage.ChunkSerializer.unpackStructureStart(ChunkSerializer.java:717) ~[?:?]
        at net.minecraft.world.level.chunk.storage.ChunkSerializer.loadChunk(ChunkSerializer.java:272) ~[?:?]
        at com.destroystokyo.paper.io.chunk.ChunkLoadTask.executeTask(ChunkLoadTask.java:106) ~[patched_1.17.1.jar:git-Paper-131]
        at com.destroystokyo.paper.io.chunk.ChunkLoadTask.run(ChunkLoadTask.java:38) ~[patched_1.17.1.jar:git-Paper-131]
        at com.destroystokyo.paper.io.QueueExecutorThread.pollTasks(QueueExecutorThread.java:105) ~[patched_1.17.1.jar:git-Paper-131]
        at com.destroystokyo.paper.io.QueueExecutorThread.run(QueueExecutorThread.java:38) ~[patched_1.17.1.jar:git-Paper-131]