Decorators don't work with tree bases, only canopies.

Illegal access when using version 1.1.1 (1.0.1 works)
`java.lang.IllegalAccessError: class dev.corgitaco.ohthetreesyoullgrow.world.level.levelgen.feature.TreeFromStructureNBTFeature tried to access private field net.minecraft.world.level.levelgen.structure.templatesystem.StructureTemplate.palettes (dev.corgitaco.ohthetreesyoullgrow.world.level.levelgen.feature.TreeFromStructureNBTFeature and net.minecraft.world.level.levelgen.structure.templatesystem.StructureTemplate are in unnamed module of loader net.fabricmc.loader.impl.launch.knot.KnotClassLoader @10bbd20a)
at dev.corgitaco.ohthetreesyoullgrow.world.level.levelgen.feature.TreeFromStructureNBTFeature.place(TreeFromStructureNBTFeature.java:60)
at net.minecraft.world.level.levelgen.feature.Feature.place(Feature.java:166)
at net.minecraft.world.level.levelgen.feature.ConfiguredFeature.place(ConfiguredFeature.java:28)
at net.minecraft.world.level.levelgen.placement.PlacedFeature.method_39646(PlacedFeature.java:54)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411)
at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762)
at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276)
at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411)
at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762)
at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
at java.base/java.util.stream.IntPipeline$1$1.accept(IntPipeline.java:180)
at java.base/java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:104)
at java.base/java.util.Spliterator$OfInt.forEachRemaining(Spliterator.java:711)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)
at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276)
at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)
at net.minecraft.world.level.levelgen.placement.PlacedFeature.placeWithContext(PlacedFeature.java:53)
at net.minecraft.world.level.levelgen.placement.PlacedFeature.placeWithBiomeCheck(PlacedFeature.java:42)
at net.minecraft.world.level.chunk.ChunkGenerator.applyBiomeDecoration(ChunkGenerator.java:357)
at net.minecraft.world.level.chunk.ChunkStatus.method_51375(ChunkStatus.java:108)
at net.minecraft.world.level.chunk.ChunkStatus$SimpleGenerationTask.doWork(ChunkStatus.java:309)
at net.minecraft.world.level.chunk.ChunkStatus.generate(ChunkStatus.java:252)
at net.minecraft.server.level.ChunkMap.method_17225(ChunkMap.java:684)
at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
at net.minecraft.server.level.ChunkMap.method_17224(ChunkMap.java:673)
at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1150)
at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482)
at net.minecraft.server.level.ChunkTaskPriorityQueueSorter.method_17634(ChunkTaskPriorityQueueSorter.java:62)
at net.minecraft.util.thread.ProcessorMailbox.pollTask(ProcessorMailbox.java:91)
at net.minecraft.util.thread.ProcessorMailbox.pollUntil(ProcessorMailbox.java:146)
at net.minecraft.util.thread.ProcessorMailbox.run(ProcessorMailbox.java:102)
at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1395)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373)
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182)
at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Render thread
Stacktrace:
at dev.corgitaco.ohthetreesyoullgrow.world.level.levelgen.feature.TreeFromStructureNBTFeature.place(TreeFromStructureNBTFeature.java:60)
at net.minecraft.world.level.levelgen.feature.Feature.place(Feature.java:166)
at net.minecraft.world.level.levelgen.feature.ConfiguredFeature.place(ConfiguredFeature.java:28)
at net.minecraft.world.level.levelgen.placement.PlacedFeature.method_39646(PlacedFeature.java:54)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411)
at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762)
at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276)
at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411)
at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762)
at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
at java.base/java.util.stream.IntPipeline$1$1.accept(IntPipeline.java:180)
at java.base/java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:104)
at java.base/java.util.Spliterator$OfInt.forEachRemaining(Spliterator.java:711)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)
at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276)
at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)
at net.minecraft.world.level.levelgen.placement.PlacedFeature.placeWithContext(PlacedFeature.java:53)
at net.minecraft.world.level.levelgen.placement.PlacedFeature.placeWithBiomeCheck(PlacedFeature.java:42)
at net.minecraft.world.level.chunk.ChunkGenerator.applyBiomeDecoration(ChunkGenerator.java:357)
at net.minecraft.world.level.chunk.ChunkStatus.method_51375(ChunkStatus.java:108)
at net.minecraft.world.level.chunk.ChunkStatus$SimpleGenerationTask.doWork(ChunkStatus.java:309)
at net.minecraft.world.level.chunk.ChunkStatus.generate(ChunkStatus.java:252)
at net.minecraft.server.level.ChunkMap.method_17225(ChunkMap.java:684)
at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
at net.minecraft.server.level.ChunkMap.method_17224(ChunkMap.java:673)
at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1150)
at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482)`

This was fixed in 1.1.2