Invalid argument supplied for foreach

[Moraes]

wore an old version of xMAP, which had seen an earlier version, I uninstalled the old joomla 1.5.20 but I'm having a problem that I can not resolve, see the message:

Warning: Invalid argument supplied for foreach() in /home/pizzaria/public_html/site/administrator/components/com_xmap/classes/XmapConfig.php on line 59
There is not created sitemaps yet

I used the google translator, sorry! I await your help