Errors in event page

Hi, when I visit an event page I get these errors:

Warning: Invalid argument supplied for foreach() in …/wp-content/plugins/modern-events-calendar-lite/app/skins/single.php on line 648

Warning: count(): Parameter must be an array or an object that implements Countable in …/wp-content/plugins/modern-events-calendar-lite/app/libraries/main.php on line 6062

Please, could you tell me what to do to fix it?

Thank you