error: cannot find symbol even on newly created projects.

I just updated the thing and it gave me this error on a compile. "Ok, I'll just create a new project. not that many stuff." Nope. even on empty projects. It's not even on my stuff, it's on the .java file MCreator itself creates. Tried cleaning the cache, reinstalling MCreator, use 0 plugins but this same error happens....

C:\Users\Ian\Desktop\Minecraft\MCreator\workplaces\RyanMod\src\main\java\net\mcreator\ryanmod\RyanmodMod.java:72: error: cannot find symbol List<AbstractMap.SimpleEntry<Runnable, Integer>> actions = new ArrayList<>();
^
symbol: class List
location: class RyanmodMod