Ok, I’ve changed the image dimensions to smaller now inside NextGen plugin. And cleared the cache. No errors are shown inside the product page now but it still gives me the wrong image when I share it on facebook. Not on Google+ thought strangely enough.
Hi,
Please go through your this Facebook debug https://developers.facebook.com/tools/debug. Enter product page url with clear cache because its taking cache url and find the real problem. You can fix this issue by using facebook debug.
Thanks
Mohammad