Hi everyone, I’m not really a super techie nor a coder, but I have found the resolution to most. This issue and other found 503 errors were being caused by the PHP Version 7.4. I have noticed it using compatibility checker tools. And as soon as I downgraded to the latest most stable version for most wordpress/woocommerce plugins which is PHP Version 7.3, everything went back to its smoothness. All issues fixed instantaneously.
You will have to do this in your website’s host cPanel or backend configuration tools. Hope this will help a lot.