Urgent for non login user

I’m already discussing this site with somebody via my internal support communications, so I’ll continue that conversation rather than duplicating it.

@joedolson please answers me my questions.

the problem is here mt_get_cart
if a user is not logged $unique_id return false, its cookie problem

$unique_id = ( isset( $_COOKIE[‘mt_unique_id’] ) ) ? $_COOKIE[‘mt_unique_id’] : false;

I checked your plugin on another site its fine but on this site its not working fine

Here’s the answer I sent to you via email:
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It’s curious. The cookie is set that’s used to track non-logged-in users, but it’s not apparently being used. Can you try disabling all other plug-ins and see if something is interfering? It seems like either data isn’t being saved to transient options *or* the transient options are being deleted prematurely; I can’t tell for sure, however.

But it could be a theme or plug-in interference, as well. You don’t appear to have any caching plug-ins installed, but if there’s an alternate cache (either from a theme or non-obvious plug-in or at the server level) that could have an impact.

@joedolson thanks
But I try with uninstall the other Plugins and current theme but it’s not worked with that

When you say ‘current theme’ do you mean that you tried it with all plug-ins deactivated and your current theme, or do you mean that you tried it with one of the WordPress default themes? If you have not tried with a default them, please check that.

I do also notice that your site has a lot of mixed-content warnings; I strongly suggest that you fix those. A plug-in like Better Search and Replace would be able to search for all instances of https://wholesomeequinenutrition.com and replace with https://wholesomeequinenutrition.com/.