I can create from “New” and set the size for a white background working start, but “Generate Image” is grayed out on both the contextual bar and the drop downs. I’ve used it before successfully.
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The only thing I could find in searching is to make sure that under
File > Preferences > Plugins > Enable Generator checkbox is ticked.
But I checked that and, as you can see in the second image, it is ticked.
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I’m not sure what more to do and really wanted to generate some images for a newsletter I’m doing.
I'm on a Win 11 PC with a current subscription to Adobe Creative Suite.

