This error while trying to create a new Payment Method.
The plugin Stripe.js / element Stripe element threw the following error: TypeError: Cannot read property 'destroy' of undefined
at Object.a.data.generateStripe (PLUGIN_Stripe-js-initialize--Stripe-element-.js:4:471)
at eval (PLUGIN_Stripe-js-update--Stripe-element-.js:3:395) (please report this to the plugin author)
Auto answer for posterity: Stripe’s error log is very accurate. In this case, I was using my real credit card in the test environment, whereas you have to limit yourself to the numbers provided for that (such as 4242 4242 4242 4242).