Plugin Support
slash1andy
(@slash1andy)
Automattic Happiness Engineer
Hey there!
While there’s not any visible errors on the site, in the console, etc., there is an indicator that there’s a conflict at play causing this: 
Link to image: https://d.pr/i/f0ACpp
This field (where it says the Stripe elements will be inserted) means there’s something blocking that from inserting the elements where it needs to.
This kind of problem is usually caused by either a conflict with your theme or with another plugin.
The best way to determine this is to:
- Temporarily switch your theme to Storefront
- Disable all plugins except for WooCommerce
- Repeat the action that is causing the problem
If you’re not seeing the same problem after completing the conflict test, then you know the problem was with the plugins and/or theme you deactivated. To figure out which plugin is causing the problem, reactivate your other plugins one by one, testing after each, until you find the one causing conflict. You can find a more detailed explanation on how to do a conflict test here.
Looks like you were right, unfortunate that it wasn’t throwing any errors but after deactivating some plugins and refreshing I was able to narrow it down to something I had installed. Thanks so much for your help!