WP Smush Pro isn't working properly


I can't activate 'ATTACHMENTS SUPER-SMUSHE' ('RESIZE SAVINGS' as well) and when I check the 'performance' tab in 'The Hub' it says that 9 images have to be smushed but when I check WP Smush on my site it says 92 of the 93 images have been smushed. I already reinstalled WP Smush and the doesn't do the trick. How can I make it work again (and get the annoying low performance score away)?