Unchecking and checking the box didn’t work for me either. And it doesn’t appear to be just a notice. It clearly says it will not work “Stripe is enabled, but a SSL certificate is not detected. Your checkout may not be secure! Please ensure your server has a valid SSL certificate – Stripe will only work in test mode.”
SSL certificate is perfectly installed so there should be no issue.
If this is just a notice the wording should be changed. I haven’t had any sales the last few days but this might actually be the reason!
What is going on?