Issues with Ninja Forms

Hi there,

It seems that MEC is not compatible with Ninja Forms.
When I insert a form in the “edit event” page, the form is correctly displayed on the MEC single event page, but there are issues for the upcoming events page (generated with the shortcode).

The following line is displayed above the event element in which I added the form:
“, “image”: “”, “name”: “name of the event”, “url”: “link of the event” }

I’ve tried another form plugin and I don’t have the issue, so it’s very specific to Ninja Forms.

An idea why?

I am running on WordPress 5.4.1 and PHP 7.4.1.

Best regards