Strange thing is some Thumbnails are not showing up altough all Project Sites have a picture… it looks like it has soemthing to do with the date? it suddenly does not work … i updated to the latest version of legenda and all plugins are up to date… also the console puts out some js errors
Please check if the problem persist when a default theme activated on your site. Also, if you use a child theme, try to activate parent theme and check the problem. Try to disable all 3-rd party plugins and check one more time.
Let us know results.