Soul Glass is not recognizing the Soul Dust item as the same one in the recipe and is unable to be crafted whatsover. Yes I made sure it's Soul Dust and not Soulium.

I have this problem too

I had the same problem and tried to find the bug altough I never messed with Java but it could be in the recipe for the soul glass
src/main/resources/data/mysticalagriculture/recipes/soul_glass.json
Seeing the original forge version of the mod it seems that the tag for glass should probably be "c:glass_blocks/colorless" and not just "c:glass". I tried compiling the mod to see if it was just that but because I'm a begginer I struggled with the dependencies and stuff. Hope it helps