Hello Peter,
Thanks for getting in touch.
I checked your site and the plugin… Not quite sure what could be the issue.
When you share an event, then eventhough you only see the main url and no image, when you click on it on Facebook it will take you to the event.
I checked it on my WordPress site and it properly shared the featured image and the page title.
I’m not quite familiar with the inner workings of Simple Share Button so can’t really say what if missing. It can happen that one of the other plugins you are using is interfering with it. To find this out you can go through our conflict testing guide. Basically deactivate all plugins, leave only the calendar ones and SSB active. Then check what the Facebook share does.
I see you are using 2 SEO plugins. I have a hunch that they might be influencing things, so you could start with deactivating those, and any caching plugin you might have (after clearing the cache).
Let me know what you find.
Cheers,
Andras