I am having issues with images on my WP site. They appear to be uploading properly because I can open the image on the browser using the file URL but none of them has valid thumbnail visible and are not being smushed either.
I tried deactivating all plugins, completely all of them and I also changed the theme to a default theme and there was still an error.
I have WP sites on the same server even using the same template and they're fine. Same php settings too. So I don't think it's a server issue.
Any image I upload doesn't seem to work and I'm not sure if it's because the WP Smush settings.