JS error

I am trying to add it to our custom menu bar and it works to add it as simply adding the shortcode. But when click it is not working and I get the following error in the console. What could it be? Cheers!

 [Show/hide message details.] Error: only one instance of babel-polyfill is allowed custombox.legacy.min.js:15:611
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/wp-content/plugins/popup-anything-on-click/assets/js/custombox.legacy.min.js:15:611
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/wp-content/plugins/popup-anything-on-click/assets/js/custombox.legacy.min.js:15:420
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/wp-content/plugins/popup-anything-on-click/assets/js/custombox.legacy.min.js:15:11