Looks like you have error in your TOS field. Go to Stripe Payments -> Settings, Advanced Settings tab, Terms and Conditions section, Checkbox Text.
Currently is looks like this:
I accept the Terms and Conditions <a href="https://yoursite.com/terms-and-conditions/></a>
First of, you are missing quote symbol at the end of your URL. It should look like this:
I accept the Terms and Conditions <a href="https://yoursite.com/terms-and-conditions/"></a>
Second, the way it currently is, your customers won’t be able to click the link to your TOS as there is nothing to click to. This is how it should look properly:
I accept the <a href="https://yoursite.com/terms-and-conditions/">Terms and Conditions</a>
Just copy the above text, paste in into Checkbox Text field and save changes. Then see if the buttons are working.