Every time when I place a maple wood block (added by Natura) the whole client crashes with java.lang.NullPointerException. I'm telling this to you because the crash is caused by Hwyla, not Natura.

I uploaded the crash-log here.

Hwyla version: 1.8.23
Forge version: 14.23.1.2561
Minecraft version: 1.12.2

This crash is caused by some other mod returning a null stack in IWailaDataProvider#getWailaStack. Probably Natura.

I have submitted a PR to Natura that will solve this. progwml6/Natura#422