Thanks Zac. This was a sudden issue for the past couple of days and I thought perhaps others might be affected and it was an issue on Numista's side. Probably a issue on my side but I can't figure out what caused it or how to correct it.
I adjusted the rules which prevent abuse of the functionality to search by image. Could you please advise whether it is now working for you?
Thanks Xavier. Yes indeed it is working now. Did I somehow break some rule where I was restricted from using this feature? If I did, it was entirely inadvertent and beyond me as to what I could have possibly done to warrant disabling the feature.