Imsanity Bulk Resize not working

Hi,
I’m using WordPress 5.3.2. I installed Imsanity and set all maximum dimensions to 1024 pixels. I clicked “Search Images” and got a list of all over-size pictures. Then I selected all the pictures on the list and clicked “Resize Selected Images”. Nothing happens. The list of oversized images remains. There is no indication that Imsanity is doing anything. If I let it sit for several minutes, I can search again. All the oversize images are still listed. Can you help?

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