From past few weeks every time I access my website by typing naked domain, I get this error The connection to “domain” is not secure

Even though I have SSL and added https redirect via htaccess

RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

P.S. I am using WordPress Multisite setup.