Hi,
I have the same problem. I have a site running on wpml on multiple domains. In the blog grid view no images show and the log is filling up with this error message. I switched from subfolders like domain.com/lng to each language separate domain. I don’t want/can’t upload each and every image for all blog posts again. Is there a way to just disable this resize function or a filter or hook I can use to do it manually? Why does it have to be saved on the same domain to begin with?
Ok, so I had to manually define WP_HOME and WP_SITEURL in the wp-config according to the requested url. I think this is a problem that comes with wpml and is not directly related to GPP. It is working now for me.