ERE Shortcodes Generator

Hello!

In order to use “Add ERE Real Estate Shortcodes” I first had to install the “Classic Editor” plugin, and then the button appears.
When I click on it in the console:
Uncaught ReferenceError: G5Utils is not defined
at HTMLAnchorElement. (insert-shortcode.min.js?ver=5.0.8:1:153)
at HTMLAnchorElement.dispatch (load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,underscore,moxiejs,plupload,wp-codemirror&ver=6.6.2:2:40035)
at HTMLAnchorElement. (load-scripts.php?c=0&load%5Bchunk_0%5D=jquery-core,jquery-migrate,utils,underscore,moxiejs,plupload,wp-codemirror&ver=6.6.2:2:38006)

If I add this code in the console:

var G5Utils = {
    popup: {
        show: function(options) {
            console.log("Showing popup with target:", options.target);
            jQuery(options.target).css({
                display: 'block',
                visibility: 'visible',
            });
        },
        close: function() {
            jQuery('#ere-input-shortcode-wrap').hide(); // Oculta el popup
        }
    }
};

(function($) {
    $(document).ready(function() {
        $(".ere-insert-shortcode-button").off("click").on("click", function() {
            console.log("Button clicked"); // Log para verificar el clic
            ERE_POPUP.required_element();
            ERE_POPUP.reset_fileds();
            if (G5Utils && G5Utils.popup && G5Utils.popup.show) {
                G5Utils.popup.show({
                    target: "#ere-input-shortcode-wrap",
                    type: "target",
                    callback: function() {}
                });
            } else {
                console.error("G5Utils.popup.show is not defined");
            }
        });

        // Manejo del cierre del popup
        $(document).on("click", ".close-popup", function() {
            G5Utils.popup.close();
        });
    });
})(jQuery);

And some CSS:

#ere-input-shortcode-wrap {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1000;
    background-color: white;
    border: 1px solid #ccc;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

Then the popup appears.

Is this just me?
Is there another, simpler way to fix it?
Is there a definitive solution?