I've had an awful time trying to get the "insert image" to work on my simple share on my campaigns today. I click on "add image" and nothing happens! I refresh and still nothing. Very irritating and frustrating that my Facebook posts won't have my clever/cute images to entice people to read my campaign. Hope you can get that fixed quickly!!!
I am sorry to hear this was happening. What version & browser are you working in when this happens? Also, what type of campaign are you trying to share?
I found this post looking for an answer to the same problem. I am currently using an old PC, however, it has lots of space and speed for images. I never had this problem before. I can't add a thumnail to my facebook post.
The age of the computer shouldn't matter as long as the system is compatiable. It sounds like it is since you've been working without a problem until now. What browser and version are you working in? Do you have another browser you could test in to help narrow this issue down?