UE4.22 - Standalone Game loads a black screen & not responding, why? image att

thanks, i cant use it, the standalone window stops responding, its not posible to open console, not even posible to minimize or close that window, i can only close it by using windows task manager,

but if i play any other UE window, like PIE´s or selected viewport, no problem at all, also packaging is not been affected… but it takes hours to make, that´s why i need standalone to work.

No idea how to fix this black screen