Events Calendar - Visibility Conditional Logic

Hi, I have a row set in a website which shows events using the The Events Calendar plugin and the shortcode [ecs-list-events]. I want to be able to hide it when there are no events, so I set-up the row’s visibility conditional logic as follows:
Post Custom Field > ecs-list-events > is set

However, this doesn’t work, does anyone have a suggestion to where I’m going wrong. Thank you.