URGENT: Variations on a new product doesn’t work, Error: d is undefined

VERY URGENT

Hi,
sorry for the urgency, but I’ve to immediately put online a no-profit association payment for year 2022 renewal and I’m using your plugin.

I just upgraded to v. 2.1.6

I have an old product with variations and it still works.

Now, I have created a new product with variations (exactly the same of the other, only with a different title) and it doesn’t work: clicking on the variations doesn’t change the price.

And in the browser console I see:

Uncaught Error: d is undefined
.../wp-content/plugins/wp-express-checkout/assets/js/public.min.js:1

I would like to buy your “Custom Fields Addon”, but if the WP Express Checkout doesn’t work correctly I’m forced to switch to another payment plugin and I’d prefer not to do this.

Thank you.