Hello, @Ioannis,
Sorry for the inconvenience but I have checked your site now and found the issue. This seems to be the cache issue on your site.
Please try to contact your service provider and flush the server cache completely.
And
I found that you are using the Wp Rocket Plugin cache which could be the reason for such an issue. please try to clear the Wp Rocket Plugin cache and browser cache as well after that check back to your site.
I hope your issue will be resolved.
Regards 8Themes Team.