Variations Button Disabled Indefinitely

Hi there,

Since updating WooCommerce to 3.3.0, the upload button for variable products stays disabled no matter which option you choose.

I tried changing the view file as per https://ww.wp.xz.cn/support/topic/woocommerce_variation_has_changed-trigger-is-not-reliable/ but this did nothing to help. It’s now reverted back to original files.

I may have to revert from 3.3.0 as this website is supposed to be going live today/tomorrow. I’m in the process of setting up a dev site so I can continue to work on any issues and check updates before making them on the live site, so I’ll provide a link if I’ve had to revert to a previous WooCommerce version before you get a chance to have a look.

The page I need help with: [log in to see the link]