Hi!
I believe the issue is, that the plugin scripts are completely missing from the site footer. I am not seeing the regular wordpress scripts there either. It is usually caused by the missing wp_footer(); function in the theme footer.php file. I highly recommend checking that.
I tried to log-in with the details, but either the login name or the password are incorrect.
Try changing this option on the plugin back-end: https://i.imgur.com/ADugXnq.png
Then clear your site cache (if you have any) and the browser cache.
If this helps, then the wp_footer() is definitely missing. Let me know!