General dysfunction

Hi,
This site http://www.x-lucchesi.com uses your FinalTile plugin which doesn’t seem to work anymore :
• images aren’t loading in a new gallery,
• when duplicated an ancient gallery is empty,
• thumbnails aren’t showing in a page,
• the shortcode pasted in a post doesn’t function anymore, nothingf shows.

WP 4.9.8 | FTG Version 3.3.46 | Formula : Lite | Theme : Vantage 1.6.9
Jetpack deactivated
What should I do ?
Thanks,
philippe

The page I need help with: [log in to see the link]