Hi there!
It looks like it might be redirecting to the HTTPS protocol. It might be a plugin doing that or maybe a wp-config setting. I looked up the headers and saw
$ curl -I http://yoursite/wp-admin/
HTTP/1.1 302 Found
Server: Apache/2.4
Cache-Control: no-cache, must-revalidate, max-age=0
Content-Type: text/html; charset=UTF-8
Date: Mon, 29 Jun 2020 14:18:11 GMT
Location: https://yoursite/wp-admin/
X-Redirect-By: WordPress
If you have SFTP connection you might be able to deactivate those by renaming the plugins folder temporarily. First thing that sort of came to mind was a security plugin or one that forces SSL. Seems the certificate may not be set up just yet maybe? Thinking out loud a little on that one.
Either way hope you can find the solution
When I made this change, I certainly didn’t understand what I was doing but now I realize that the cert is definitely not set up yet.
I’m hosted with Laughing Squid so I don’t really have access with an SFTP connection or to the server.
Probably a noob question, but would Laughing Squid be able to help with this ? Since they host the site ?