I got the following error log on loading an old world, each time the same.
Windows 7 (x64) 6.1 Java: 1.8.0_131 amd64 0.9_37 -H:3072 -D:3072 (Steam)
Intel(R) Core(TM)2 CPU 6700 @ 2.66GHz, 0A68h, 8191 MB (3203 MB Heap)
NVIDIA Quadro 6000 20170814000000.000000-000 21.21.13.7761
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Error converting byte[] to ClientInventory/Chest (Item: paper 110)
java.lang.NullPointerException
at content.util.ClientUtils$ConversionUtils.fillItemsIntoSlots(SourceFile:886)
at content.util.ClientUtils$ConversionUtils.byteArrayToInventory(SourceFile:854)
at aJ.o.a(SourceFile:541)
at commons.JIWApplication.update(SourceFile:286)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.runLoop(LwjglAbstractDisplay.java:151)
at com.jme3.system.lwjgl.LwjglDisplay.runLoop(LwjglDisplay.java:197)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:232)
at java.lang.Thread.run(Unknown Source)
