After update Unity to 2017.3.0f3 i can't drag and drop

Hi everyone, after update Unity to 2017.3.0f3 i can’t drag and drop my files from folder on my computer to unity. For example, in early versions, i can drag and drop jpeg files from my folder on the computer to project section in unity, after update i can’t.

I am encountering the same problem for 2017.3.1p3