Event calendar doesn’t load future months

I installed the Eveny Calendar 3 in my website (and is only displayed in the homepage):
https://ginelafashion.com/es/

The current month is displayed fine, but if I click on the arrows to go to the next month, the calendar doesn’t load the events scheduled for it, and the loading image stays even when the Activity window of my browser says the page has finished loading.

What could it be??

Many thanks in advance for your help!