The ‘you did not properly include lepopup.js’ error appears when the popup library fails to load before the popup trigger fires. In this case, the cause was on our end: a script in the page footer was crashing before the page finished rendering, which prevented the popup engine from loading. Scrolling the page after the partial load can sometimes let older cached scripts run, which is why the calendar appeared to work intermittently. We identified and corrected the underlying issue, and the booking calendar is now loading normally on all property pages. If you still see the error after a hard refresh, please reach out and we will take a closer look.