Blend Material Isn't working

Hello, As I just started learning Unreal vertex painting, Every time I select my materials i want from Megascan, It says “Current Material Blending setup doesn’t support more than 3 material instances”.
I only have 3 selected in my content browser, tried selecting from Quixel bridge also says same thing

Hi, did you try to uninstall and reinstall the quixel bridge plugin? Cause there seemed to have been an issue with it Material Blending - #7 by AMintKing