Issue: Invalid argument supplied for foreach()

Error Info
ErrorException: Invalid argument supplied for foreach() - library/vw/XenForo/ViewPublic/Forum/List.php:32 
Generated By: Alfa, 3 minutes ago

Stack Trace
#0 library/vw/XenForo/ViewPublic/Forum/List.php(32): XenForo_Application::handlePhpError(2, 'Invalid argumen...', '...', 32, Array)
#1 library/NFLJ/AMS/XenForo/ViewPublic/Forum/List.php(9): vw_XenForo_ViewPublic_Forum_List->renderHtml()
#2 library/CTA/FeaturedThreads/ViewPublic/Forum/List.php(7): NFLJ_AMS_XenForo_ViewPublic_Forum_List->renderHtml()
#3 library/XenForo/ViewRenderer/Abstract.php(227): CTA_FeaturedThreads_ViewPublic_Forum_List->renderHtml()
#4 library/XenForo/ViewRenderer/HtmlPublic.php(71): XenForo_ViewRenderer_Abstract->renderViewObject('CTA_FeaturedThr...', 'Html', Array, 'forum_list')
#5 library/XenForo/FrontController.php(606): XenForo_ViewRenderer_HtmlPublic->renderView('XenForo_ViewPub...', Array, 'forum_list', NULL)
#6 library/XenForo/FrontController.php(158): XenForo_FrontController->renderView(Object(XenForo_ControllerResponse_View), Object(XenForo_ViewRenderer_HtmlPublic), Array)
#7 index.php(13): XenForo_FrontController->run()
#8 {main}
Request State
array(3) {
  ["url"] => string(38) "https://site.com/"
  ["_GET"] => array(0) {
  }
  ["_POST"] => array(0) {
  }
}