Cannot update some products?

Hi,

I updated to latest version of WooCommerce last wednesday and was onoe of the people facing massive problems afterwards.

On thursday, I managed to downgrade to old version and now almost everything works fine except one strange thing.

When editing some of the current products, you cannot click on the “update” button and save changes. The error message pops up in console when you click and nothing happens.

Error showing:
An invalid form control with name=’_download_limit’ is not focusable.
post.php?post=15255&action=edit:1
An invalid form control with name=’_download_expiry’ is not focusable.

Have anyone experienced the same issue? Any idea what can be the problem?

Thanks in advance!