I'm also having "The page isn't redirecting properly". I've got a test site set up in my local XAMPP environment,
having made the modifications suggested by @torvista on this support-thread posting for v4 of the URI mappings.
My local site's configuration, provided in /local/configure.php identifies the **HTTP_SERVER ** as 'http://www.mysite.local' and the **DIR_WS_SERVER ** is set to '/'.
The .htaccess file contains the ceon-generated defaults:
## BEGIN CEON URI MAPPING REWRITE RULE
RewriteEngine On
# Don't rewrite any URIs ending with a file extension (ending with .[xxxxx])
RewriteCond %{REQUEST_URI} !\.[a-z]{2,5}$ [NC]
# Don't rewrite any URIs for some, popular specific file format extensions,
# which are not covered by main file extension condition above
RewriteCond %{REQUEST_URI} !\.(mp3|mp4|h264|woff2)$ [NC]
# Don't rewrite admin directory
RewriteCond %{REQUEST_URI} !^/myadmin [NC]
# Don't rewrite editors directory
RewriteCond %{REQUEST_URI} !^/editors/ [NC]
# Don't rewrite feed directory
RewriteCond %{REQUEST_URI} !^/feed/ [NC]
# Don't rewrite logs directory
RewriteCond %{REQUEST_URI} !^/logs/ [NC]
# Handle all other URIs using Zen Cart (its index.php)
RewriteRule .* index.php [QSA,L]
## END CEON URI MAPPING REWRITE RULE
The multiple redirects are, as identified by @wvasconselos here, within the _checkForAndHandleIndexPage processing for the index page.
I enter https://www.mysite.local in the browser address bar, I'm seeing that on entry to that function that $request_uri is set to '/', $_GET['main_page'] is set to 'index' and no other $_GET variables are present. The $redirection_uri to which the request is sent is '/' (same as entered); that's where the loop arises.
I'll also note that the site displays once the URI mappings are disabled in the admin.
