Issue: Class 'vw_Hard_Core' not found

When disabling VW, I get this:

Error: Class 'vw_Hard_Core' not found - library/vw/XenForo/Search/DataHandler/Base.php:377
Generated By: Alfa, A moment ago
Stack Trace

#0 /library/SV/ElasticEss/XenES/Search/SourceHandler/ElasticSearch.php(199): vw_XenForo_Search_DataHandler_Base->filterConstraints(Object(SV_ElasticEss_XenES_Search_Sour ceHandler_ElasticSearch), Array)
#1 /library/SV/ElasticEss/XenES/Search/SourceHandler/ElasticSearch.php(224): SV_ElasticEss_XenES_Search_SourceHandler_ElasticSearch->parseConstraints(Array, Array, Array)
#2 /library/XenForo/Search/Searcher.php(79): SV_ElasticEss_XenES_Search_SourceHandler_ElasticSearch->searchGeneral('gettin off righ...', Array, 'date', 1)
#3 /library/SV/ElasticEss/Model.php(677): XenForo_Search_Searcher->searchGeneral('gettin off righ...', Array, 'date', 1)
#4 /library/SV/ElasticEss/Model.php(648): SV_ElasticEss_Model->validateSuggestion(Object(SV_ElasticEss_XenForo_Model_Se arch), Object(XenForo_Search_Searcher), Array)
#5 /library/SV/ElasticEss/XenForo/ControllerPublic/Search.php(531): SV_ElasticEss_Model->getSuggestions('5', Array)
#6 /library/XenForo/FrontController.php(369): SV_ElasticEss_XenForo_ControllerPublic_Search->actionResults()
#7 /library/XenForo/FrontController.php(152): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch))
#8 /index.php(13): XenForo_FrontController->run()
#9 {main}

Request State

array(3) {
["url"] => string(89) "https://my-forum.com/search/2145125/?q=ff+right&t=resource_update&o=relevance"
["_GET"] => array(4) {
["/search/2145125/"] => string(0) ""
["q"] => string(17) "off right"
["t"] => string(15) "resource_update"
["o"] => string(9) "relevance"
}
["_POST"] => array(0) {
}
}