I received an email from LifeMiles offering to sell 1,000 LM for USD $10.99, which I figured was reasonable to keep my miles from expiring until I can use them (I want to book LH F but as we know that only opens up within two weeks of the flight). I follow the emailed link, fill out the form, verify that each field has a check mark as I fill it in, check the boxes at the bottom, which causes the "Purchase Lifemiles" button to go from gray to blue, but clicking it doesn't do anything. I'm on a Mac and have tried current Safari, a very old Firefox, a current Brave, and a current Opera. Always the same. Even tried it in Spanish just to see, but no go

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Putting the mouse over it turns the mouse into the hand with the finger that means it's a clickable link, but clicking it doesn't actually do anything.