for my $try (1 .. 5) {
        debug("fetching HTML source: try $try of 5\n") if $debug;

        my $mech  = WWW::Mechanize->new(
            autocheck => 0,
            ssl_opts  => {
                verify_hostname => 0,
                SSL_version     => 'TLSv1',
            },
            timeout   => 60,
        );
        $mech->proxy('https', $args_hr->{proxy});

        # Try::Tiny
        try {
            $mech->get( $url );
        }
        catch {
            $err .= $_ if $_;
        };
        my $text = $mech->content;
        $err    .= "Can't fetch HTML source from $url!\n" if !$mech->success();

        ...

        sleep 30; # before next try - if download was not succ.
}