NullPointerException in DroppedSyringeBlockEntity.handler$zic000$checkAllowBossTag on game version 1.18.2

[hhdsjgit]

Server Error:

9:42:57] [Server thread/ERROR]: A BlockEntity type net.ltxprogrammer.changed.block.entity.DroppedSyringeBlockEntity has thrown an exception trying to write state. It will not persist, Report this to the mod author
java.lang.NullPointerException: null
at java.util.ImmutableCollections$ListN.indexOf(ImmutableCollections.java:716) ~[?:?]
at java.util.ImmutableCollections$AbstractImmutableList.contains(ImmutableCollections.java:329) ~[?:?]
at net.ltxprogrammer.changed.block.entity.DroppedSyringeBlockEntity.handler$zic000$checkAllowBossTag(DroppedSyringeBlockEntity.java:530) ~[%5B1%5DChanged-m1.18.2-v0.14.1-all.jar%2353!/:task ':jar' property 'archiveVersion']
at net.ltxprogrammer.changed.block.entity.DroppedSyringeBlockEntity.getVariant(DroppedSyringeBlockEntity.java:32) ~[%5B1%5DChanged-m1.18.2-v0.14.1-all.jar%2353!/:task ':jar' property 'archiveVersion']
at net.ltxprogrammer.changed.block.entity.DroppedSyringeBlockEntity.m_183515_(DroppedSyringeBlockEntity.java:53) ~[%5B1%5DChanged-m1.18.2-v0.14.1-all.jar%2353!/:task ':jar' property 'archiveVersion']
at net.minecraft.world.level.block.entity.BlockEntity.m_187482_(BlockEntity.java:93) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at net.minecraft.world.level.block.entity.BlockEntity.m_187480_(BlockEntity.java:80) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at net.minecraft.world.level.chunk.LevelChunk.m_8051_(LevelChunk.java:389) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at net.minecraft.world.level.chunk.storage.ChunkSerializer.m_63454_(ChunkSerializer.java:335) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at net.minecraft.server.level.ChunkMap.m_140258_(ChunkMap.java:786) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at net.minecraft.server.level.ChunkMap.m_202998_(ChunkMap.java:483) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:718) ~[?:?]
at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) ~[?:?]
at net.minecraft.server.level.ChunkMap.m_140353_(ChunkMap.java:456) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at net.minecraft.server.level.ChunkMap.m_140280_(ChunkMap.java:427) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at net.minecraft.server.level.ServerChunkCache.m_201698_(ServerChunkCache.java:361) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at net.minecraft.server.level.ServerLevel.m_8793_(ServerLevel.java:396) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:1229) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at net.minecraft.server.dedicated.DedicatedServer.m_5703_(DedicatedServer.java:397) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:1144) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:984) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at net.minecraft.server.MinecraftServer.m_177918_(MinecraftServer.java:344) ~[server-1.18.2-20220404.173914-srg.jar%2370!/:?]
at java.lang.Thread.run(Thread.java:833) [?:?]

Players will be kicked out of the server due to an internal server error.

[LtxProgrammer]

checkAllowBossTag is a mixin function that another mod injected into Changed's code. This error would be for whichever Changed addon mod you have installed, and not the main mod.