"An error occurred in e4mc" when starting lan server
try changing the version of e4mc or Fabric Language Kotlin, which is likely to be a version conflict.
"an error occurred in e4mc" in 1.20.1 custom pack (i got logs, dont worry)
根据我过去的经验以及我刚刚的尝试,建议试一下换一下e4mc的版本或者Fabric Language Kotlin的版本,大概率是版本冲突的问题。