From email: import grayed out

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I can’t import any files at all. I have .xml, .csv and even .txt and nothing! It grays out the option for me. Do you have any suggestions?

Did you mean “grays out button OK”?

yes, when I got to import any of these files it grays out the ok button and I can’t proceed.
I’m on macOS High Sierra and upgraded to the latest version because I couldn’t import from the previous version either.

Can you please show a screenshot of import dialog with chosen file and disabled ok button? Please make the dialog wide so that we could see the file name.