[Render thread/WARN]: Exception loading entity: 
q: Loading entity NBT at akn.f(SourceFile:1596) ~[1.15.1-pre1.jar:?] 
at akr.a(SourceFile:436) ~[1.15.1-pre1.jar:?] 
at akr$$Lambda$3010/38205588.accept(Unknown Source) ~[?:?] 
at t.a(SourceFile:341) ~[1.15.1-pre1.jar:?] 
at akr.a(SourceFile:435) ~[1.15.1-pre1.jar:?] 
at akr.b(SourceFile:488) [1.15.1-pre1.jar:?] 
at akr.a(SourceFile:469) [1.15.1-pre1.jar:?] 
at bja.d(SourceFile:256) [1.15.1-pre1.jar:?] 
at dsz.a(SourceFile:22) [1.15.1-pre1.jar:?] 
at dsz.a(SourceFile:12) [1.15.1-pre1.jar:?] 
at dsn.a(SourceFile:106) [1.15.1-pre1.jar:?] 
at dsn.b(SourceFile:95) [1.15.1-pre1.jar:?] 
at dsn$$Lambda$3606/1161820020.run(Unknown Source) [1.15.1-pre1.jar:?] 
at dsn.a(SourceFile:127) [1.15.1-pre1.jar:?] 
at dsn.a(SourceFile:95) [1.15.1-pre1.jar:?] 
at dqo.a(SourceFile:1207) [1.15.1-pre1.jar:?] 
at dqk.a(SourceFile:718) [1.15.1-pre1.jar:?] 
at dqk.a(SourceFile:543) [1.15.1-pre1.jar:?] 
at dbl.d(SourceFile:947) [1.15.1-pre1.jar:?] 
at dbl.b(SourceFile:585) [1.15.1-pre1.jar:?] 
at net.minecraft.client.main.Main.main(SourceFile:202) [1.15.1-pre1.jar:?]
Caused by: java.lang.NullPointerException 
at aqs.hashCode(SourceFile:93) ~[1.15.1-pre1.jar:?] 
at java.util.HashMap.hash(HashMap.java:338) ~[?:1.8.0_51] 
at java.util.HashMap.put(HashMap.java:611) ~[?:1.8.0_51] 
at java.util.HashSet.add(HashSet.java:219) ~[?:1.8.0_51] 
at ape.a(SourceFile:44) ~[1.15.1-pre1.jar:?] 
at ath.eD(SourceFile:370) ~[1.15.1-pre1.jar:?] 
at ath.a(SourceFile:448) ~[1.15.1-pre1.jar:?] 
at akn.f(SourceFile:1587) ~[1.15.1-pre1.jar:?] 
... 20 more