I could confirm the issue on your site.
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.”?
Solution for this topic
I logged in to your site and found the issue is occurring because of the transient set in the following theme file so I temporary removed that code and the counter is working fine now.
Could you please confirm whether it is working fine now?