Here are some details:
1.Every time I click on the color picker, the UE4 editor just went down and I was forced to shut down the whole application.
2.I tried UE4.90 preview version and met the same problem.
3.It seems that the process of compiling shader went wrong.
4.The problem occurred the first time I tried to edit the color of the material.
5.My laptop is Msi GT80.
Could somebody help, please?
Problem solved by closing all the msi software. I guess there are application crashes. Hope this answer can be helpful to those who are using msi laptops.
So I just found the solution, not very user friendly but it works. I have MSI laptop and for who knows why Nahimic software audio is cousin this. Had to crash several times UE until I found out finally. So now every time I wan’t to use color picker I have to close Nahimic software it’s strange how these programs has anything in common I don’t know, and It’s still unknown is it really UE bug, maybe it’s Nahimic software written badly 