Issue: Undefined variable: filename - library/vw/XenForo/Option/Seo.php:26

Error Info
ErrorException: Undefined variable: filename - library/vw/XenForo/Option/Seo.php:26
Generated By: dvsDave, 20 minutes ago
Stack Trace
#0 /home/nginx/domains/controlbooth.com/public/library/vw/XenForo/Option/Seo.php(26): XenForo_Application::handlePhpError(8, 'Undefined varia...', '/home/nginx/dom...', 26, Array)
#1 [internal function]: vw_XenForo_Option_Seo::validate(1, Object(vw_XenForo_DataWriter_Option), 'vw_seo')
#2 /home/nginx/domains/controlbooth.com/public/library/XenForo/DataWriter/Option.php(366): call_user_func_array(Array, Array)
#3 /home/nginx/domains/controlbooth.com/public/library/vw/XenForo/DataWriter/Option.php(32): XenForo_DataWriter_Option->_validateOptionValuePreSave('1')
#4 /home/nginx/domains/controlbooth.com/public/library/XenForo/DataWriter/Option.php(222): vw_XenForo_DataWriter_Option->_validateOptionValuePreSave('1')
#5 /home/nginx/domains/controlbooth.com/public/library/XenForo/DataWriter.php(1460): XenForo_DataWriter_Option->_preSave()
#6 /home/nginx/domains/controlbooth.com/public/library/XenForo/DataWriter.php(1399): XenForo_DataWriter->preSave()
#7 /home/nginx/domains/controlbooth.com/public/library/XenForo/Model/Option.php(572): XenForo_DataWriter->save()
#8 /home/nginx/domains/controlbooth.com/public/library/vw/XenForo/Model/Option.php(162): XenForo_Model_Option->updateOptions(Array)
#9 /home/nginx/domains/controlbooth.com/public/library/XenForo/ControllerAdmin/Option.php(179): vw_XenForo_Model_Option->updateOptions(Array)
#10 /home/nginx/domains/controlbooth.com/public/library/phc/LinkDirectory/Extend/XenForo/ControllerAdmin/Option.php(7): XenForo_ControllerAdmin_Option->actionSave()
#11 /home/nginx/domains/controlbooth.com/public/library/XenForo/FrontController.php(351): phc_LinkDirectory_Extend_XenForo_ControllerAdmin_Option->actionSave()
#12 /home/nginx/domains/controlbooth.com/public/library/XenForo/FrontController.php(134): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch))
#13 /home/nginx/domains/controlbooth.com/public/admin.php(13): XenForo_FrontController->run()
#14 {main}
Request State
array(3) {
  ["url"] => string(70) "https://www.controlbooth.com/admin.php?options/save/vw_server_settings"
  ["_GET"] => array(1) {
    ["options/save/vw_server_settings"] => string(0) ""
  }
  ["_POST"] => array(3) {
    ["options"] => array(12) {
      ["vw_enabled"] => string(1) "1"
      ["vw_bburl"] => string(28) "https://www.controlbooth.com"
      ["vw_cdn_url"] => string(0) ""
      ["vw_filename"] => string(4) "wiki"
      ["vw_protocol"] => string(1) "2"
      ["vw_titlevar"] => string(5) "title"
      ["vw_spaces"] => string(1) "0"
      ["vw_seo"] => string(1) "1"
      ["vw_languageid"] => string(1) "1"
      ["vw_wiki_name"] => string(4) "Wiki"
      ["vw_apikey"] => string(16) "*************"
      ["vw_cache_life"] => string(1) "0"
    }
    ["options_listed"] => array(12) {
      [0] => string(10) "vw_enabled"
      [1] => string(8) "vw_bburl"
      [2] => string(10) "vw_cdn_url"
      [3] => string(11) "vw_filename"
      [4] => string(11) "vw_protocol"
      [5] => string(11) "vw_titlevar"
      [6] => string(9) "vw_spaces"
      [7] => string(6) "vw_seo"
      [8] => string(13) "vw_languageid"
      [9] => string(12) "vw_wiki_name"
      [10] => string(9) "vw_apikey"
      [11] => string(13) "vw_cache_life"
    }
    ["_xfToken"] => string(8) "********"
  }
}