I can reproduce the "403" error using curl. The error looks caused by htaccess file. It does not affect HTTP requests to your "home" page. But, it does the acme-challenge path for some reason
# Original HTTP request redirects to HTTPS
curl -i http://blog.ingber.com/.well-known/acme-challenge/Test404
HTTP/1.1 302 Found
Server: Apache
Location: https://blog.ingber.com/.well-known/acme-challenge/Test404
# Following that gets 403
curl -i https://blog.ingber.com/.well-known/acme-challenge/Test404
HTTP/1.1 403 Forbidden
Date: Thu, 15 Aug 2024 18:55:11 GMT
Server: Apache
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>403 Forbidden</title>
</head><body>
<h1>Forbidden</h1>
<p>You don't have permission to access this resource.
Server unable to read htaccess file, denying access to be safe</p>
</body></html>