Hello
and thanks for replay;

The problem there is wrong information inside on /cgi-bin/ubr_upload.pl :
my $TEMP_DIR = '/var/www/templates_c/'; # MUST BE DUPLICATED IN THE "UBR_INI.PHP" FILE
witch are wrong information, can not be the same path in ubr_ini.php, there path is only:
$TEMP_DIR = VSHARE_DIR . '/templates_c/';

I hope this info will help future users with same issue ;)