Widgets glitched + nativization error in 4.18.3

Hi,

I have quite a big problem with my game here. I recently upgraded from 4.15.3 to 4.18.3 and suddenly the user widgets started to glitch in the packaged game (opening more than once, bad references such as character’s health in HUD).

And also, every nativized blueprint has the same error : error C2440: ‘’: cannot convert from ‘initializer list’ to ‘FBlueprintDependencyData’.

Any help is welcome, thanks.