In the AutoConfig binary, the import for class net.minecraft.client.gui.screen.Screen is written as net.minecraft.client.gui.screens.Screen, which is causing the code to not compile when using the documented way to create the mod config screen (AutoConfig.getConfigScreen). However, in the source code the import is written correctly.

Affects latest versions (4.11.14), older versions (4.9.5) do not have this bug.

It is called mappings, what are you doing, loom is supposed to map the classes