I hope you are well today and thanks for posting here.
I could confirm the issue on my test site therefore notified the theme developer about this so that it will be fixed.
The issue will be fixed ASAP.
In the meanwhile you can add custom CSS code in the theme settings as shown in the attached screenshot.
The JS output content element is working fine for me after deactivating custom coded plugin from my site so it doesn’t seem the issue with theme functionality.
Would you mind if i log in to your site and do some troubleshooting? If this is ok then could you please share me your site log in details privately by adding them in the box having text “Click here to share private content. Only you and forum moderators will be able see it.”?