Gravatar won't display with any author box

Hi,

I can’t get my gravatar to display with any author box plugin. A blank image appears instead.

See it here: https://blog.copyjoint.com/content-curation-strategy/

My theme: https://www.ads-software.com/themes/clean-retina

My author box plugin (previously fancier author box): https://www.ads-software.com/plugins/wp-author-box-lite/