CU 185 - Cannot access GUI login screen, I see error 404

I just did fresh install of CU 185 to FriendlyElec R2S and I see the same issue. I cannot access GUI login screen, I see error 404.

IPfire runs, I write this post and I am connected with R2S. I know that CU 185 is not the latest version, I installed older version because I would like to test upgrade…

Troubleshooting with curl:

user@linux:~/Downloads/speedtest$ curl -k https://192.168.13.1:444/gpl.cgi
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>404 Not Found</title>
</head><body>
<h1>Not Found</h1>
<p>The requested URL was not found on this server.</p>
</body></html>
user@linux:~/Downloads/speedtest$ curl -k -I http://192.168.13.1:81/
HTTP/1.1 302 Moved Temporarily
Date: Fri, 18 Oct 2024 01:36:07 GMT
Server: Apache
X-Content-Type-Options: nosniff
Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src: 'self' data:
Referrer-Policy: strict-origin
X-Frame-Options: sameorigin
Location: /cgi-bin/gpl.cgi

user@linux:~/Downloads/speedtest$ curl -k -I http://192.168.13.1:81/cgi-bin/gpl.cgi
HTTP/1.1 301 Moved Permanently
Date: Fri, 18 Oct 2024 01:37:53 GMT
Server: Apache
X-Content-Type-Options: nosniff
Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src: 'self' data:
Referrer-Policy: strict-origin
X-Frame-Options: sameorigin
Location: https://192.168.13.1:444/gpl.cgi
Content-Type: text/html; charset=iso-8859-1

Redirection is wrong, URL https://192.168.13.1:444/gpl.cgi is a bug. I should be redirected to https://192.168.13.1:444/cgi-bin/gpl.cgi, it works and I see login form.

Neither, the start page is still called https://192.168.31.1:444/cgi-bin/index.cgi I think.
https://192.168.1.1:444/cgi-bin/gpl.cgi gives me the same output like https://192.168.31.1:444/cgi-bin/index.cgi with curl, but in the browser only the index.cgi is also opened, the gpl.cgi gives 404 in the browser.