Module Customer portal error: Invalid argument supplied for foreach()

Good evening, I wanted to point in the customer portal, the customer side, when you click on the ticket, the system generates the following error:
- Warning: Invalid argument supplied for foreach() in /portal/HelpDesk/TicketDetail.php on line 52

This is the line of code 52

foreach($ticketinfo as $key=>$value) {

Looking forward to your feedback, best regards.

Solved.
The issue was due to different $default_charset between config.inc.php and PortalConfig?.php files.
In the first file was 'ISO-8859-1', in the second 'UTF-8' like in the MySql? database.
Setting $default_charset='UTF-8' in config.inc.php solve this issue.
Regards.