So, again I come here to ask you for help.

I'm using Apus RealState Template with WooCommerce. Everything was fine til I installed a payment gateway module...

Now, Wordpress logs the following to the console with every page I try to load:

Uncaught TypeError: Cannot read property 'includes' of undefined

at HTMLDocument. (erede.js:6)
at i (jquery.js?ver=1.12.4:2)
at Object.fireWith [as resolveWith] (jquery.js?ver=1.12.4:2)
at Function.ready (jquery.js?ver=1.12.4:2)
at HTMLDocument.K (jquery.js?ver=1.12.4:2)

(anonymous) @ erede.js:6
i @ jquery.js?ver=1.12.4:2
fireWith @ jquery.js?ver=1.12.4:2
ready @ jquery.js?ver=1.12.4:2
K @ jquery.js?ver=1.12.4:2

This is the context mentioned from erede.js:

(function( $ ) {
'use strict';

$( function() {

    var checkIfInputHasDefaultBehavior = $("#checkInputClass").css("background-image").includes("url");
    
    if(!checkIfInputHasDefaultBehavior)
    {   
        return;
    }

but when I change the template, this error stops happening... does anyone know what might be going on?