When I select images to optimize ("Optimiser sélection", it works... but only for like 40 images and the other ones keep waiting indefinitely. So on website where I have hundreds of images to optimize, it is a bit cumbersome
(if you need access to the website in order to check further, just let me know. But I think it is quite general as I have the same issue on other sites...)
I'm having similar issue with either the Optimize All or if I try to optimize a bulk of 10 images or so. When doing bulk Optimize I can see some of the ajax requests return an error 504 (Gateway timeout)
How can we get around this? I have over 4000 images to optimize and can't do them manually 10 by 10...