[3.0] Variable products are not working …

This is typically caused by a Javascript error that’s preventing the AJAX calls from WooCommerce in working correctly. As a test, are you still experiencing the same issue after deactivating all of your plugins (except WooCommerce) and switching to the default Twenty Sixteen theme?

I have the same problem or kind of.
I deactivated every pluging and switched to the main theme and same thing keep happen.

Even if the product is available, every variation of the product keep saying: “product not available, select another variation”