---- Minecraft Crash Report ----
Description: Unexpected error
aa: Non [a-z0-9_.-] character in namespace of location: ResourceKey[minecraft:worldgen/template_pool / minecraft:empty]
    at zy.<init>(SourceFile:38)
    at zy.<init>(SourceFile:46)
    at csc.a(SourceFile:122)
    at esf.a(SourceFile:1083)
    at java.base/java.util.Optional.ifPresent(Optional.java:178)
    at esf.a(SourceFile:1080)
    at ss.a(SourceFile:49)
    at ss.a(SourceFile:14)
    at sj.a(SourceFile:22)
    at axe.d(SourceFile:157)
    at axi.d(SourceFile:23)
    at axe.x(SourceFile:131)
    at axe.bn(SourceFile:116)
    at edr.f(SourceFile:1076)
    at edr.e(SourceFile:728)
    at net.minecraft.client.main.Main.main(SourceFile:237)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Thread: Render thread
Stacktrace:
    at zy.<init>(SourceFile:38)
    at zy.<init>(SourceFile:46)
    at csc.a(SourceFile:122)
    at esf.a(SourceFile:1083)
    at java.base/java.util.Optional.ifPresent(Optional.java:178)
    at esf.a(SourceFile:1080)
    at ss.a(SourceFile:49)
    at ss.a(SourceFile:14)
    at sj.a(SourceFile:22)
    at axe.d(SourceFile:157)
    at axi.d(SourceFile:23)
    at axe.x(SourceFile:131)
-- Affected level --
Details:
    All players: 1 total; [evq['hdt80br0'/37, l='ClientLevel', x=9.50, y=-60.00, z=0.50]]
    Chunk stats: 729, 461
    Level dimension: minecraft:overworld
    Level spawn location: World: (0,-60,0), Section: (at 0,4,0 in 0,-4,0; chunk contains blocks 0,-64,0 to 15,319,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,-64,0 to 511,319,511)
    Level time: 315 game time, 315 day time
    Server brand: vanilla
    Server type: Integrated singleplayer server
Stacktrace:
    at ese.a(SourceFile:453)
    at edr.d(SourceFile:2277)
    at edr.e(SourceFile:752)
    at net.minecraft.client.main.Main.main(SourceFile:237)
-- Last reload --
Details:
    Reload number: 1
    Reload reason: initial
    Finished: Yes
    Packs: Default