I apologize for the difficulty @wiff29.3
The cause of this failure is due to a ProtonMail address, which are currently considered a fraud risk due to the number of bad actors who utilize the email provider for malicious attacks.
Please utilize a different email address to purchase the LastPass subscription.
How can you run a business when your payment system does not work & customers can not pay you???? I have wasted over an hour trying to resolve this issue. All I want to do is pay for an upgrade to the PREMIUM version.