23:01:05] [Server thread/FATAL]: Error executing task on Chunk source main thread executor for minecraft:overworld
java.util.concurrent.CompletionException: java.lang.NoSuchFieldError: lastPos
	at java.util.concurrent.CompletableFuture.encodeThrowable(Unknown Source) ~[?:1.8.0_271]
	at java.util.concurrent.CompletableFuture.completeThrowable(Unknown Source) ~[?:1.8.0_271]
	at java.util.concurrent.CompletableFuture.uniApply(Unknown Source) ~[?:1.8.0_271]
	at java.util.concurrent.CompletableFuture$UniApply.tryFire(Unknown Source) ~[?:1.8.0_271]
	at java.util.concurrent.CompletableFuture$Completion.run(Unknown Source) ~[?:1.8.0_271]
	at net.minecraft.class_3900.method_17634(class_3900.java:58) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_1255.method_18859(class_1255.java:144) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_3215$class_4212.method_18859(class_3215.java:545) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_1255.method_16075(class_1255.java:118) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_3215$class_4212.method_16075(class_3215.java:554) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_3215.method_19492(class_3215.java:280) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.server.MinecraftServer.method_20415(MinecraftServer.java:749) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.server.MinecraftServer.method_16075(MinecraftServer.java:737) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_1255.method_18857(class_1255.java:127) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.server.MinecraftServer.method_16208(MinecraftServer.java:722) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.server.MinecraftServer.method_3774(MinecraftServer.java:505) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.server.MinecraftServer.method_3735(MinecraftServer.java:338) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_1132.method_3823(class_1132.java:67) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:645) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:257) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_271]
Caused by: java.lang.NoSuchFieldError: lastPos
	at net.minecraft.class_1309.<init>(class_1309.java:219) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_1308.<init>(class_1308.java:125) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_1314.<init>(class_1314.java:12) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_1296.<init>(class_1296.java:28) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_1429.<init>(class_1429.java:39) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_1472.<init>(class_1472.java:110) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_1299.method_5883(class_1299.java:463) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_1299.method_17846(class_1299.java:472) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at java.util.Optional.map(Unknown Source) ~[?:1.8.0_271]
	at net.minecraft.class_1299.method_5892(class_1299.java:472) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_1299.method_17848(class_1299.java:535) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_1299.method_17842(class_1299.java:516) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_2852.method_12386(class_2852.java:378) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_2852.method_12388(class_2852.java:138) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_2818.method_12206(class_2818.java:479) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at net.minecraft.class_3898.method_17227(class_3898.java:622) ~[intermediary-minecraft-1.16.4-client.jar:?]
	at com.mojang.datafixers.util.Either.lambda$mapLeft$0(Either.java:162) ~[datafixerupper-4.0.26.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-4.0.26.jar:?]
	at com.mojang.datafixers.util.Either.mapLeft(Either.java:162) ~[datafixerupper-4.0.26.jar:?]
	at net.minecraft.class_3898.method_20460(class_3898.java:611) ~[intermediary-minecraft-1.16.4-client.jar:?]
	... 19 more