Routing Not Working - Only Index Route Accessible

Code:

    # Remove index.php from URL - .htaccess
    RewriteCond %{HTTP:X-Requested-With}    !^XMLHttpRequest$
    RewriteCond %{THE_REQUEST}              ^[^/]*/index\.php [NC]
    RewriteRule ^index\.php(.*)$            $1 [R=301,NS,L]

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