BUG: javafx not installed for java 16.

[zaphod77]

While minecraft doesn't require it, some mods do.

The Java autodownloaded by the launcher should contain JavaFX.

Yes, it seems the official is missing it as well. that's probably why people are having trouble with mods.

[rakion99]

do you have a mod or mods that need it?

[zaphod77]

https://www.curseforge.com/minecraft/mc-mods/king-mammoth-cut-scenes is one example.

javafx is present in the java 8, but not the 16.