The file has already been generated but why wasn’t it included?
As it stated, even though it exists and is loaded; it may be improperly set up.
How to set this up, other projects recognize its own .dll even I do nothing.
Ahhhhh yes, I’m so stupid.
This happens because I reinstall the engine.
And on the previous one, I enabled this HairStrands plugin by default, so it wasn’t included in the .uproject file.
So just simply add it back.
bahhhhhhhhhhh