can't find 301 redirect from http to https

Hi,

A cpanel add on domain has WordPress installed on it via Softaculous.

When I load the admin for the first time,

http://www.example.com/wp-admin

is redirected to

https://www.example.com/wp-admin

which produces a 404.

Using http://www.internetofficer.com/seo-tool/redirect-check/, I see there is a “Type of redirect: 301 Moved Permanently”

There was no .htaccess in the web root folder. I uploaded a default one, and nothing changed.