Glimmering Weald causes JER to fail to load.
1.19.2 and 1.20.1 were tested as a comparison group.
If this issue is caused by changes in the JER, feel free to point it out.

1.20.1-beta

Tested for Artifact-740 & 582.
JustEnoughResources-1.20.1-1.4.0.222 same.

Leave Glimmering Weald only

JER can not load
debug.log

Disabled Glimmering Weald only

JER can load normally
debug.log

1.19.2-418

Nothing disabled, loaded normally except cartographer throwing NPE (a issue Just an issue that has been fixed in 1.20.1)

debug.log

it's possible this is occurring because biome lookups are being done too early in JER?

oh damn i didn't know registering biomes through code could cause this much problems !!

@qznfbnj is this reproducible post 7db5549 ?

@qznfbnj is this reproducible post 7db5549 ?

Test for artifact-750 (which include 7db5549), same.
debug.log

Could you check if 11dc39e (4.0-beta-425) fixes this?

Could you check if 11dc39e (4.0-beta-425) fixes this?

yes it works (tested with artifact-767), but it say //This is a terrible temporary fix until the real issue is found , so i don't know if i should close this issue.

It'll be fine to close it for now, we will try finding a better way to fix it later ^^