Thank you for revert.
Below is what I tried to do, but didn't work, yes that was typo, i meant URI::Escape
Is it because i tried escaping IP too, do i really need to escape ip address.

##proxy authentication
$PROXY_USER = uri_escape($PROXY_USER);
$PROXY_PASSWD = uri_escape($PROXY_PASSWD);
$PROXY_IP = uri_escape($PROXY_IP);
    
           
my $proxy_url = "${PROXY_USER}:${PROXY_PASSWD}"."\@${PROXY_IP}:${PROXY
+_PORT}";    ### oh, just realized, looks like forgot to add "http://"
+. here before proxy user that's why it failed, can you just confirm t
+he same.

$ua->proxy(https => "$proxy_url");
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