The bug:
I summoned an allay and the game crashed.

Reproduce:
1. Run /summon minecraft:allay
→ Crash

Minecraft Crash Report:
---- Minecraft Crash Report ----
// There are four lights!

Time: 4/20/22, 11:45 AM
Description: Ticking entity

java.lang.NullPointerException: Cannot invoke "dnm.a()" because "$$1" is null
at dnt.c(SourceFile:109)
at dnl.b(SourceFile:72)
at dnq.a(SourceFile:43)
at biq.a(SourceFile:204)
at biq.a(SourceFile:176)
at biq.a(SourceFile:153)
at bco.a(SourceFile:135)
at bco.a(SourceFile:65)
at bco.a(SourceFile:26)
at bbd.e(SourceFile:45)
at bam.d(SourceFile:516)
at bam.a(SourceFile:475)
at blv.T(SourceFile:219)
at azt.eL(SourceFile:768)
at azr.w_(SourceFile:2624)
at azt.w_(SourceFile:551)
at blv.w_(SourceFile:231)
at azr.k(SourceFile:2369)
at azt.k(SourceFile:351)
at blv.k(SourceFile:240)
at aeq.a(SourceFile:704)
at cef.a(SourceFile:465)
at aeq.a(SourceFile:365)
at cwl.a(SourceFile:54)
at aeq.a(SourceFile:333)
at net.minecraft.server.MinecraftServer.b(SourceFile:881)
at net.minecraft.server.MinecraftServer.a(SourceFile:825)
at fjd.a(SourceFile:97)
at net.minecraft.server.MinecraftServer.v(SourceFile:671)
at net.minecraft.server.MinecraftServer.a(SourceFile:263)
at java.base/java.lang.Thread.run(Thread.java:833)

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

– Head –
Thread: Server thread
Stacktrace:
at dnt.c(SourceFile:109)
at dnl.b(SourceFile:72)
at dnq.a(SourceFile:43)
at biq.a(SourceFile:204)
at biq.a(SourceFile:176)
at biq.a(SourceFile:153)
at bco.a(SourceFile:135)
at bco.a(SourceFile:65)
at bco.a(SourceFile:26)
at bbd.e(SourceFile:45)
at bam.d(SourceFile:516)
at bam.a(SourceFile:475)
at blv.T(SourceFile:219)
at azt.eL(SourceFile:768)
at azr.w_(SourceFile:2624)
at azt.w_(SourceFile:551)
at blv.w_(SourceFile:231)
at azr.k(SourceFile:2369)
at azt.k(SourceFile:351)
at blv.k(SourceFile:240)
at aeq.a(SourceFile:704)
at cef.a(SourceFile:465)
at aeq.a(SourceFile:365)
at cwl.a(SourceFile:54)
at aeq.a(SourceFile:333)

– Entity being ticked –
Details:
Entity Type: minecraft:allay (blv)
Entity ID: 106
Entity Name: Allay
Entity's Exact location: 110.74, 66.08, 96.81
Entity's Block location: World: (110,66,96), Section: (at 14,2,0 in 6,4,6; chunk contains blocks 96,-64,96 to 111,319,111), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,-64,0 to 511,319,511)
Entity's Momentum: 0.00, 0.00, 0.00
Entity's Passengers: []
Entity's Vehicle: null
Stacktrace:
at cef.a(SourceFile:465)
at aeq.a(SourceFile:365)
at cwl.a(SourceFile:54)
at aeq.a(SourceFile:333)
at net.minecraft.server.MinecraftServer.b(SourceFile:881)
at net.minecraft.server.MinecraftServer.a(SourceFile:825)
at fjd.a(SourceFile:97)
at net.minecraft.server.MinecraftServer.v(SourceFile:671)
at net.minecraft.server.MinecraftServer.a(SourceFile:263)
at java.base/java.lang.Thread.run(Thread.java:833)

– Affected level –
Details:
All players: 0 total; []
Chunk stats: 2383
Level dimension: minecraft:overworld
Level spawn location: World: (0,0,0), Section: (at 0,0,0 in 0,0,0; 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: 7102791 game time, 6000 day time
Level name: §1§lMinecraft Creations/Tests
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Known server brands: vanilla
Level was modded: false
Level storage version: 0x04ABD - Anvil
Stacktrace:
at net.minecraft.server.MinecraftServer.b(SourceFile:881)
at net.minecraft.server.MinecraftServer.a(SourceFile:825)
at fjd.a(SourceFile:97)
at net.minecraft.server.MinecraftServer.v(SourceFile:671)
at net.minecraft.server.MinecraftServer.a(SourceFile:263)
at java.base/java.lang.Thread.run(Thread.java:833)

– System Details –
Details:
Minecraft Version: 22w16a
Minecraft Version ID: 22w16a
Operating System: Windows 10 (amd64) version 10.0
Java Version: 17.0.1, Microsoft
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
Memory: 6151691752 bytes (5866 MiB) / 7482638336 bytes (7136 MiB) up to 10737418240 bytes (10240 MiB)
CPUs: 12
Processor Vendor: GenuineIntel
Processor Name: Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz
Identifier: Intel64 Family 6 Model 165 Stepping 2
Microarchitecture: unknown
Frequency (GHz): 2.59
Number of physical packages: 1
Number of physical CPUs: 6
Number of logical CPUs: 12
Graphics card #0 name: Intel(R) UHD Graphics
Graphics card #0 vendor: Intel Corporation (0x8086)
Graphics card #0 VRAM (MB): 1024.00
Graphics card #0 deviceId: 0x9bc4
Graphics card #0 versionInfo: DriverVersion=26.20.100.7642
Graphics card #1 name: NVIDIA GeForce RTX 2060
Graphics card #1 vendor: NVIDIA (0x10de)
Graphics card #1 VRAM (MB): 4095.00
Graphics card #1 deviceId: 0x1f15
Graphics card #1 versionInfo: DriverVersion=30.0.14.9649
Memory slot #0 capacity (MB): 8192.00
Memory slot #0 clockSpeed (GHz): 3.20
Memory slot #0 type: DDR4
Memory slot #1 capacity (MB): 8192.00
Memory slot #1 clockSpeed (GHz): 3.20
Memory slot #1 type: DDR4
Virtual memory max (MB): 20950.04
Virtual memory used (MB): 18378.45
Swap memory total (MB): 4745.83
Swap memory used (MB): 157.68
JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx10G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Server Running: true
Player Count: 0 / 8; []
Data Packs: vanilla, file/video_datapack, file/fanfare.zip (incompatible)
World Generation: Stable
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Client jar signature and brand is untouched; Server jar signature and brand is untouched