Fatal error with custom function

I’ve been using a custom function in my theme’s functions.php and it had been working just fine until very recently, when I just discovered that trying to view any event causes a fatal error. Something must have changed on a recent update of the plugin.

Here is the functions code that causes the error:

add_filter('tribe_get_events_title', 'change_upcoming_events_title');

function change_upcoming_events_title($title) {
	//We'll change the title on upcoming and map views
	if (tribe_is_upcoming() or tribe_is_map() or tribe_is_photo()) return 'Events Calendar';

	//In all other circumstances, leave the original title in place
	return $title;
}

The trouble spot seems to be:
tribe_is_map()

Again, this has been working properly until I noticed the error yesterday.
Any ideas? Thank you!

https://www.ads-software.com/plugins/the-events-calendar/