Lightroom Edit In options are greyed out


When I'm in Lightroom, I can't access any of my external editors. They are all greyed out. 


The most common cause of this is that you are trying to edit Smart Previews in Lightroom with an external editor. External editors require the original file. You likely have your files on an external hard drive that isn't plugged in. Try plugging in your drive and see if it starts working again.

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