"Edit In" menu greyed out in Lightroom after recent update

[Queative]

Hope someone can help because the most recent discussion of this issue was last December. Problem: Yesterday I was able to edit across Lightroom, Photoshop, and the Nik Collection, specifically ColorEFX Pro. Today I am not able to use my preferred workflow, even after updating LR, PS, and Bridge. I've tried opening PS first, then opening LR, but to no avail. I'm on a iMac (27-inch, Late 2009), using macOS High Sierra.

[GoldingD]

First obvious question you will probably instantly dismiss,

You do have an image  selected?

[Queative]

Image is "selected."

[GoldingD]

And after that, perhaps reset your preferences. Read/watch the following links for the why, the how, and the prep

https://lightroomers.com/replacing-the-lightroom-preference-file/745/

https://www.youtube.com/watch?v=bARt-hoCc2Q

https://helpx.adobe.com/lightroom/kb/preference-file-and-other-file-locations---lightroom-6.html

https://helpx.adobe.com/lightroom/kb/recover-catalog-images-resetting-lightroom.html

[Queative]

Resetting Preferences did not work... "Edit In" remains greyed out.

[JohanElzenga]

Are you sure the original image is available? If you use smart previews, then a 'missing image' is not so obvious because you won't see the notorious exclamation point. You can't send a smart preview from Lightroom to Photoshop, however.

[GoldingD]

How about a screenshot