In the method VertexCollector.create(), Iceberg uses Fabric's VersionPredicateParser.parse() instead of the api VersionPredicate.parse(). This causes an incompatibility with Quilt.

I believe this issue is present in the branches 1.19.3-fabric and 1.19.4-fabric

Minecraft 1.19.4
Quilt Loader 0.18.10
Quilted Fabric API 6.0.0-beta.6+0.79.0-1.19.4
Iceberg 1.1.8

Legendary Tooltips has been used as an example cause of the crash, although the actual bug is in Iceberg, as said above.

Logs can be found here
https://mclo.gs/62Y3bm0

How to fix

1. Go to com/anthonyhilyard/iceberg/renderer/VertexCollector.java
2. In the create() method, change useSodiumVersion to use VersionPredicate.parse() instead of VersionPredicateParser.parse()
3. done

Thank you for the helpful information. I've made this change in the latest version of Iceberg (1.1.10).