I use Pligg_Beta_9.8. I have got error from RSS Importer when I added the feed Propeller.com Money Stories

I click "Add a new field link" and I see

Code:
Warning: Invalid argument supplied for foreach() in /home/site.com/www/modules/rss_import/rss_import_main.php on line 373
This stroke
PHP Code:
foreach ($z as $item => $key) { 
Help me, please.

Thank you.