This mod crashed the game, in the crash report it says :
java.lang.RuntimeException: Could not execute entrypoint stage 'main' due to errors, provided by 'modid'!
...
Caused by: java.lang.ExceptionInInitializerError
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Caused by: java.lang.IllegalStateException: Registry is already frozen (trying to add key ResourceKey[minecraft:mob_effect / potion-config:health_boost])
...
And in the logs it says that there is an "Error loading class: net/minecraft/class_7706 (java.lang.ClassNotFoundException: net/minecraft/class_7706)" (and class 7923)
I hope that this will be fixed cuz I find your mod very interesting and I really want to custom potions ^^