What you’re describing is somewhat covered by these articles:
In short: any connections to your website that’s not from a browser will not work. This includes WordPress’ own loopback connections, as well as any API calls or webhooks to your website (API access from your website to other providers, like Meta, do work).
WordPress cron jobs can be run using regular WP Cron, which runs some background tasks alongside regular web requests, If you need to help the cron along for some reason, you can just trigger it directly by opening the URL https://clickmart45.kesug.com/wp-cron.php in your browser.
For most websites, this is not a big issue, and WordPress cron updates getting stuck is usually caused by bad jobs blocking the queue, not by lacking cron job or loopback request support.
But this applies mainly to vanilla WordPress. WooCommerce is a much more complicated beast, and so are the wealth of plugins on top of it to integrate with external marketplaces, which may have their own dependencies and complications.
All in all, I’m 70% sure that the error you’re seeing is a red herring and doesn’t actually impact your website. But I’m no WooCommerce expert so I’m not completely sure.