[23:54:47 WARN]: Failed to load datapacks, can't proceed with server load. You can either fix your datapacks or reset to vanilla with --safeMode
java.util.concurrent.ExecutionException: java.lang.IllegalStateException: Unbound values in registry ResourceKey[minecraft:root / minecraft:worldgen/placed_feature]: [fokastudio:ash/replace_blocks]
at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:396) ~[?:?]
at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2073) ~[?:?]
at net.minecraft.server.Main.main(Main.java:256) ~[purpur-1.19.2.jar:git-Purpur-1818]
at org.bukkit.craftbukkit.Main.main(Main.java:316) ~[purpur-1.19.2.jar:git-Purpur-1818]
at io.papermc.paperclip.Paperclip.lambda$main$0(Paperclip.java:42) ~[app:?]
at java.lang.Thread.run(Thread.java:833) ~[?:?]
Caused by: java.lang.IllegalStateException: Unbound values in registry ResourceKey[minecraft:root / minecraft:worldgen/placed_feature]: [fokastudio:ash/replace_blocks]
at net.minecraft.core.MappedRegistry.freeze(MappedRegistry.java:341) ~[?:?]
at net.minecraft.core.RegistryAccess$RegistryEntry.freeze(RegistryAccess.java:294) ~[?:?]
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?]
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?]
at java.util.HashMap$EntrySpliterator.forEachRemaining(HashMap.java:1832) ~[?:?]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?]
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[?:?]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[?:?]
at net.minecraft.core.RegistryAccess$ImmutableRegistryAccess.(RegistryAccess.java:258) ~[?:?]
at net.minecraft.core.RegistryAccess.freeze(RegistryAccess.java:234) ~[?:?]
at net.minecraft.server.Main.lambda$main$0(Main.java:229) ~[purpur-1.19.2.jar:git-Purpur-1818]
at net.minecraft.server.WorldLoader.load(WorldLoader.java:22) ~[purpur-1.19.2.jar:git-Purpur-1818]
at net.minecraft.server.WorldStem.dataPackResources(WorldStem.java:11) ~[purpur-1.19.2.jar:git-Purpur-1818]
at net.minecraft.server.Main.lambda$main$1(Main.java:223) ~[purpur-1.19.2.jar:git-Purpur-1818]
at net.minecraft.Util.blockUntilDone(Util.java:818) ~[?:?]
at net.minecraft.Util.blockUntilDone(Util.java:813) ~[?:?]
at net.minecraft.server.Main.main(Main.java:222) ~[purpur-1.19.2.jar:git-Purpur-1818]
... 3 more

Fixed, I didn't upload some file changes :/