Version: Nether-API-v1.4.2-mc1.12.2.
Log: https://mclo.gs/5oLPLBm
When Dynamic Trees, or its forks are present, Nether API throws a crash during the first stage of initialization. Crash wasn't present on "Nether-API-v1.3.0-mc1.12.2", which was the last version I found success on.