Susa38 on "[Plugin: All-in-One Event Calendar] Custom MySQL query?"

Thanks Sharon
I have worked with your solution but it does not work for me.
I have on my functions file on the theme support for featured images and I work with it on my diferent templates but I think this is not the way to get the post thumbnail from an event.

I think it work on other way on all in one event calendar

on the article where I get to show the post it uses:

foreach ( $dates as $date ) {
		foreach ( $date['events']['allday'] as $instance ) {
			$post_title   = $instance->get( 'post' )->post_title;
			$post_name    = $instance->get( 'post' )->post_name;
			$post_content = $instance->get( 'post' )->post_content;
			$instance_id  = $instance->get( 'instance_id' );
			$content     .= '<div class="hp-event">
				<a href="ai1ec_event/'.$post_name.'/?instance_id='.$instance_id.'">'
				.$post_title.'</a><br />'
				.$post_content.
				'<a class="read-more-link"  href="ai1ec_event/'.$post_name.'/?instance_id='.$instance_id.'">read more</a>
			</div>';
		}

this is the article
https://gist.github.com/lukaspawlik/045dbd5b517a9eb1cf95

and this is the AI1EC Event properties

https://gist.github.com/lukaspawlik/c4a0e605414542e844dd

but I can not get the thumbnail image