HTTPS was working fine, now doesn’t

Hi!

I built this site in the Twenty Nineteen theme a few months ago, and at first the site showed up fine when I plugged in https://theevolvingman.com. A couple of weeks ago something stopped working, and now when I visit https://theevolvingman.com I get a “Your connection is not private” error. Do you know what changed?

I would think it was an expired SSL certificate, but whatever SSL certificate I had wasn’t bought separately–when I built the site in Twenty Nineteen it automatically worked in https.

Thanks in advance!

Cheers,
Julian

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