Warning: Invalid argument supplied for foreach() in /data/

Getting the following error in the footer section of the wiki pages. I would like to remove the footer section but wanted to know if this error is familiar to anybody. This error is coming from a widget that displays links.

Warning: Invalid argument supplied for foreach() in /data/12/1/147/54/1147054/user/1218532/htdocs/dh2012/wp-content/plugins/wiki/wiki-include.php on line 631

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Update: I'm actively using the Random Posts Widget. This error only appear to occur with the wiki plugin.