Ical Links not injected for non-terminal calendars

On my development instance (MoccaCal 2.5.1, XWiki 7.4.2) the "ical" link in the calendar overview stops being injected at the first non-terminal calendar page.

See screenshot; the "Other Events" and "A Terminal" are terminal calendar pages; the "New Calendar" is the first non-terminal calendar in the list.

After embedding the MoccaiCalendar.Service javascript in a non-minified way the JS error shows in line 6:

 TypeError: $(...).find(...)[0] is undefined
	var calendarLink = $(this).find("td a")[0].attributes.href.value