Issue: ErrorException: Undefined variable: foonote

Fehlermeldung des Servers
Fehlerinformation
ErrorException: Undefined variable: foonote - vault/core/model/parser/legacy/mediawiki/bbcode/vw.php:145
Generiert durch: Unbekanntes Benutzerkonto, Vor 12 Minuten
Stapelverfolgung

#0 ../vault/core/model/parser/legacy/mediawiki/bbcode/vw.php(145): XenForo_Application::handlePhpError(8, 'Undefined varia...', '/var/www/vhosts...', 145, Array)
#1 ../vault/core/model/parser/legacy/mediawiki/bbcode/vw.php(60): vw_Parser_Legacy_MediaWiki_bbcode_Model->parse_ref('[h="2"] Kontakt...')
#2 ../library/vw/XenForo/BbCode/Parser.php(1133): vw_Parser_Legacy_MediaWiki_bbcode_Model->parse('[h="2"] Kontakt...')
#3 ../library/vw/XenForo/BbCode/Parser.php(986): vw_XenForo_BbCode_Parser->_vwDoLegacyCode('[h="2"] Kontakt...', Array)
#4 ../library/vw/XenForo/BbCode/Parser.php(804): vw_XenForo_BbCode_Parser->vwParseBbCode('[h="2"] Kontakt...')
#5 ../vault/core/model/parser/instance/xf.php(141): vw_XenForo_BbCode_Parser->vwInstanceParse('[h="2"] Kontakt...')
#6 ../vault/core/view/content/page/vw.php(279): vw_Parser_Instance_Model_XF->parse(Array)
#7 ../vault/core/view/content/page/vw.php(47): vw_Content_Page_View->process_pagetext(Array, NULL)
#8 ../vault/core/view/factory/content/vw.php(91): vw_Content_Page_View->unwrapped(Array, NULL)
#9 ../vault/core/view/factory/content/versioned/vw.php(24): vw_Factory_Content_View->get_content(Array, NULL)
#10 ../vault/core/view/ui/page/vw.php(41): vw_Factory_Content_Versioned_View->make(Array, NULL)
#11 ../vault/core/controller/ui/page/vw.php(759): vw_UI_Page_View->view(Object(vw_UI_Page_Controller_XF))
#12 ../vault/core/controller/ui/stack/vw.php(304): vw_UI_Page_Controller->view()
#13 ../vault/core/controller/ui/stack/vw.php(236): vw_UI_Stack_Controller->view()
#14 ../library/vw/XenForo/ControllerPublic/Wiki.php(68): vw_UI_Stack_Controller->execute()
#15 ../library/XenForo/FrontController.php(351): vw_XenForo_ControllerPublic_Wiki->actionIndex()
#16 ../library/XenForo/FrontController.php(134): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch))
#17 ../index.php(13): XenForo_FrontController->run()
#18 {main}

Benötigter Status

array(3) {
  ["url"] => string(50) "http://regio-portal.wiki/wiki/Michelberg-Gymnasium"
  ["_GET"] => array(0) {
  }
  ["_POST"] => array(0) {
  }
}