Content Browser files/folders can not be clicked

Good day ladies and gentlemen,

As titled above, i am having a problem that I can not click in any folder or any file available in the Content Browser. I only can select the file/folder and then press on “Enter” button.
the same applied to materials nodes, texture…

Any idea?

I don’t remember that i played with the settings.

Best Regards

Upupupupupup