Options don’t show in product submission page after WP and WC update

I have been using this great plugin for over a year without any issue. But as of today, I updated my WP and WooCommerce plugin to their latest version to keep up with my other plugin requirements.

But now, Simple Product Option doesn’t show at all in my product submission page, even on the products that have options before. The tab showing only ‘Add Option’ button, and it doesn’t work when I click it. I tried making a new product as well, still doesn’t work. On my uploaded products by the store front-end, the options are showing just fine, they are still there. I have tried deactivating the plugin and reactivating it again, the error still persists

Please help me because I need to update my product options really really soon.