java.lang.AbstractMethodError while ticking entity

My world crashed all time. Please help me! (It is not online or severs).

1.14.4\: [^crash-2019-08-22_14.37.22-server.txt]

Description: Ticking entity

java.lang.AbstractMethodError
	at aot.i(SourceFile:65)
	at anf.c(SourceFile:66)
	at anf$$Lambda$2779/532984218.test(Unknown Source)
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:174)
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
	at java.util.Iterator.forEachRemaining(Iterator.java:116)
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
	at anf.a(SourceFile:69)
	at aiy.dc(SourceFile:623)
	at aix.k(SourceFile:2266)
	at aiy.k(SourceFile:487)
	at aim.k(SourceFile:140)
	at ara.k(SourceFile:44)
	at arc.k(SourceFile:80)
	at aix.h(SourceFile:2111)
	at aiy.h(SourceFile:294)
	at vk.a(SourceFile:583)
	at vk$$Lambda$2755/1935717838.accept(Unknown Source)
	at bhr.a(SourceFile:675)
	at vk.a(SourceFile:386)
	at net.minecraft.server.MinecraftServer.b(SourceFile:835)
	at net.minecraft.server.MinecraftServer.a(SourceFile:774)
	at eac.a(SourceFile:128)
	at net.minecraft.server.MinecraftServer.run(SourceFile:642)
	at java.lang.Thread.run(Thread.java:745)