On WPX staging wiki:
{{#transcludelist:WPX:WikiProject Dogs/List 1|maxItems=1|defaultSort=random|includeDesc=false|columns=Big Dogs}}
leads to:
Catchable fatal error: Argument 2 passed to CollaborationListContent::filterColumns() must be of the type array, string given, called in /var/www/html/w/extensions/CollaborationKit/includes/content/CollaborationListContent.php on line 311 and defined in /var/www/html/w/extensions/CollaborationKit/includes/content/CollaborationListContent.php on line 575