Woocommerce | Subscription Items – Buttons and next payment field not working

I’m having trouble with WordPress’s Woocommerce.

For some reason the buttons are not working nor if I change the next payment date and save is working.

This section is under: WooCommerce > Subscription > Edit Subscription.

On the page, it’s under: Subscription Items & Billing Schedule.

In the screenshot attached, in the highlighted long red box, those buttons are not working when you click on them.

The highlighted red box on the upper right, when you change the date and update, the date does not save. I’ve made sure everything is up to date, even WordPress itself.