I’ve disabled the plugin in question, but the issue remains. Seems to be related to the js files in the current child theme, but have no idea what amendments to make to these js files so your plugin works.
TypeError: g.blockUI is undefined[Learn More] checkout.min.js:1:90
https://www.ciltskillnet.ie/wp-content/plugins/woocommerce/assets/js/frontend/checkout.min.js:1:90
https://www.ciltskillnet.ie/wp-content/themes/salient-child/js/jquery.min.js:2:27146
https://www.ciltskillnet.ie/wp-content/themes/salient-child/js/jquery.min.js:2:27914
https://www.ciltskillnet.ie/wp-content/themes/salient-child/js/jquery.min.js:2:29705
https://www.ciltskillnet.ie/wp-content/themes/salient-child/js/jquery.min.js:2:29890
Can you please take another look and maybe suggest changes? I’ll leave Cf7 Product And Custom Post List Dropdown plugin disabled until Monday, but will need to reactivate then as the site requires it for day to day use.