Flickr can't find a valid callback URL

Hi,

since yesterday everything was working fine and this morning all my AFGs have disappeared. In exchange, I get the message Flickr can’t find a valid callback URL. I found some guides and support forums in which they say to change the callback url in the administration flow settings to http://www.igordindida.it/wp-admin, which I did.

But still not working. Anybody can help ?

Please not that I am not too familiar with apps so it might take while for me to understand your instructions.

Thanks in advance. 😉

https://wordpress.org/plugins/awesome-flickr-gallery-plugin/