A mod is using the chunk lib without first requiring the area lib before it. In the future I will change this to an error instead of a warning and include a stack trace.
If you are unsure which mod is calling the function I will need your mod list.json file
has been done. have looked in your code, where the message is generated.
if someone doesn't have a clue, he is quite lost when it comes to something like this. could have been avoided.