Issue: Undefined variable: userId - library/vw/XenForo/DataWriter/User.php:58

Error Info
    ErrorException: Undefined variable: userId - library/vw/XenForo/DataWriter/User.php:58
    Generated By: alfa, 4 minutes ago

    Stack Trace
    #0 /public_html/library/vw/XenForo/DataWriter/User.php(58): XenForo_Application::handlePhpError(8, 'Undefined varia...', '/home/...', 58, Array)
    #1 /public_html/library/UserEss/DataWriter/User.php(15): vw_XenForo_DataWriter_User->_postDelete()
    #2 /public_html/library/XenForo/DataWriter.php(1779): UserEss_DataWriter_User->_postDelete()
    #3 /public_html/library/XenForo/Controller.php(1019): XenForo_DataWriter->delete()
    #4 /public_html/library/XenForo/ControllerAdmin/User.php(606): XenForo_Controller->_deleteData('XenForo_DataWri...', 'user_id', 'admin.php?users...')
    #5 /public_html/library/XenForo/FrontController.php(347): XenForo_ControllerAdmin_User->actionDelete()
    #6 /public_html/library/XenForo/FrontController.php(134): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch))
    #7 /public_html/admin.php(13): XenForo_FrontController->run()
    #8 {main}
    Request State
    array(3) {
    ["url"] => string(66) "https://site.com/admin.php?users/blurry1.241992/delete"
    ["_GET"] => array(1) {
    ["users/blurry1_241992/delete"] => string(0) ""
    }
    ["_POST"] => array(2) {
    ["_xfConfirm"] => string(1) "1"
    ["_xfToken"] => string(8) "********"
    }
    }