Issue: [E_WARNING] array_merge(): Expected parameter 2 to be an array, null given

ErrorException: [E_WARNING] array_merge(): Expected parameter 2 to be an array, null given src/addons/vw/vw/_core/view/external/rss/vw.php:60
Generated by: Unknown account Nov 21, 2019 at 12:38 AM
Stack trace
#0 [internal function]: XF::handlePhpError(2, '[E_WARNING] arr...', 's...', 60, Array)
#1 src/addons/vw/vw/_core/view/external/rss/vw.php(60): array_merge(Array, NULL)
#2 src/addons/vw/vw/_core/view/external/vw.php(183): vw_External_RSS_View->content_structure()
#3 src/addons/vw/vw/_core/view/ui/external/vw.php(35): vw_External_View->end()
#4 src/addons/vw/vw/_core/view/reply/view/vw.php(48): vw_UI_External_View->resolve(Array)
#5 src/addons/vw/vw/_core/view/reply/base/vw.php(134): vw_Reply_View_View->render_type('xml')
#6 src/addons/vw/vw/_core/view/reply/stack/vw.php(44): vw_Reply_base_View->render('xml')
#7 src/addons/vw/vw/_core/view/reply/stack/vw.php(44): vw_Reply_Stack_View->render('xml')
#8 src/addons/vw/vw/XF/Mvc/View.php(74): vw_Reply_Stack_View->render('xml')
#9 src/XF/Mvc/Renderer/AbstractRenderer.php(91): vw\vw\XF\Mvc\View->renderXml()
#10 src/XF/Mvc/Renderer/Xml.php(74): XF\Mvc\Renderer\AbstractRenderer->renderViewObject('vw\\vw:Wiki', 'public:vw_gener...', Array)
#11 src/XF/Mvc/Dispatcher.php(458): XF\Mvc\Renderer\Xml->renderView('vw\\vw:Wiki', 'public:vw_gener...', Array)
#12 src/XF/Mvc/Dispatcher.php(440): XF\Mvc\Dispatcher->renderView(Object(XF\Mvc\Renderer\Xml), Object(XF\Mvc\Reply\View))
#13 src/XF/Mvc/Dispatcher.php(400): XF\Mvc\Dispatcher->renderReply(Object(XF\Mvc\Renderer\Xml), Object(XF\Mvc\Reply\View))
#14 src/XF/Mvc/Dispatcher.php(58): XF\Mvc\Dispatcher->render(Object(XF\Mvc\Reply\View), 'xml')
#15 src/XF/App.php(2184): XF\Mvc\Dispatcher->run()
#16 src/XF.php(391): XF\App->run()
#17 index.php(20): XF::runApp('XF\\Pub\\App')
#18 {main}
Request state
array(4) {
["url"] => string(27) "/Folklore/Languages?do=feed"
["referrer"] => bool(false)
["_GET"] => array(2) {
["/Folklore/Languages"] => string(0) ""
["do"] => string(4) "feed"
}
["_POST"] => array(0) {
}
}