Helping a neighbor to optimize her WP website. She used something called "Short Pixel" and it gave her an error message saying that 12 images "can't" be optimized. I suspect it's a problem with the plugin. Don't want to get too deep into this website since it's a neighbor and I don't have direct access. She talks to me, I talk back and then she does stuff on her website. It if were mine and I had full-control I'd dig in deeper. So, I'm looking for a fast easy answer. Different plugin?