Im attempting to use the DawnCraft minecraft modpack for my server and it doesnt seem to be working.

[pure harbor]

I dont know what the code in the error means so im hoping someone else here can help me.

java.util.ConcurrentModificationException: null
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1013) ~[?:?] {}
at java.util.ArrayList$Itr.next(ArrayList.java:967) ~[?:?] {}
at com.electronwill.nightconfig.core.conversion.ObjectConverter.convertConfigsToObject(ObjectConverter.java:394) ~[core-3.6.4.jar%237!/:?] {}

[ocean ruin]

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