Hey Petros,
That doesn’t look like a PHP error. Would you mind providing a screenshot and also the output of your complete error or WP debug log?
Another way to test if our theme is the cause of this issue is to first switch to PHP 7.2 so your site will work as normal then switch to the default WordPress theme and deactivate all third-party plugins then switch to PHP 7.3. If the issue persists at this point, it’s surely an issue with your web host. If you can’t do this to your live site, copy your site to a staging server and do the test. Please note that we need this test.
If the issue doesn’t happen with the default WordPress theme, it could be possible that a feature of PHP 7.3 is not compatible with our theme. Please note that that’s just a hypothesis. We will need to see the actual PHP error related to our theme.
Just adding here that I have a site using PHP 7.3 and Pro is working perfectly well so that’s another point that a particular PHP 7.3 feature could be in conflict. You will need to be the one to test the options in your server though. I could only show you the settings that are working.


Please also note that if a PHP feature is found to be in conflict, we could not guarantee a fix for it. It will need to be submitted to our issue tracker for further investigation.
Thanks for understanding.