Hello 3nines, 

There is a conflict between Amelia and Elementor popup, unfortunately. It can work only with some customization. Some JS and CSS code needs to be added to the back-end of WP, and some IDs and classes to the buttons and popups in Elementor (in creating/editing popup/page).

There isn't a way of changing the code in Amelia in order for this to work, but our developers will see if there is any easier solution to this but for now, some customization needs to be done.

This is the customization needed:

You need to add JS and CSS to the WP back-end, so if you don't have a place for that there, you can install the Add Admin JavaScript and Add Admin CSS plugins, and then apply the following:

CSS:

.el-select-dropdown, .el-popper {
z-index: 9999 !important}
.am-modal {
z-index: 9999 !important}

JS

if (!('ameliaBooking' in window)) {
window.ameliaBooking = {};
}
if (!('disableAutomaticLoading' in window['ameliaBooking'])) {
window.ameliaBooking.disableAutomaticLoading = true;
}
document.addEventListener('DOMContentLoaded', function(event) {
document.getElementById('ameliaPopUpButton').onclick = function() {
setTimeout(function () {
var ameliaPopUpForms = document.getElementsByClassName('amelia-elementor-popup');
for (var i = 0; i < ameliaPopUpForms.length; i++) {
window.ameliaBooking.load(ameliaPopUpForms[i], null, {});
}
}, 500);
};
var ameliaForms = document.getElementsByClassName('amelia-elementor-form');
for (var i = 0; i < ameliaForms.length; i++) {
window.ameliaBooking.load(ameliaForms[i], null, {});
}
});

You need to add an ID to the Edit button "ameliaPopUpButton":

Then, you need to enable "Prevent Closing on Overlay":

And then, when you're adding the shortcode in the pop-up, you need to add the class 'amelia-elementor-popup':

If you're adding a shortcode which is not in a pop-up, you need to add the class 'amelia-elementor-form'.