Advanced exception handling not working anymore

class CustomPageErrorHandler : PageErrorHandler {
    override fun handleComponentExceptions(pageErrors: PageErrors, request: HstRequest, response: HstResponse): Status {
        response.forward("/page-technical-error")
        return Status.HANDLED_TO_STOP
    }
} 

// check if it's requested to forward.
final String forwardPathInfo = rootWindow.getResponseState().getForwardPathInfo();

// page error handling...
PageErrors pageErrors = getPageErrors(sortedComponentWindows, true);

if (pageErrors != null) {
    PageErrorHandler.Status handled = handleComponentExceptions(pageErrors, requestContainerConfig, rootWindow, requestMap.get(rootWindow), responseMap.get(rootWindow));

    // page error handler should be able to override redirect location or forward path info.
    if (rootWindow.getResponseState().getRedirectLocation() != null) {
        redirectLocation = rootWindow.getResponseState().getRedirectLocation();
    }

    if (handled == PageErrorHandler.Status.HANDLED_TO_STOP && redirectLocation == null && forwardPathInfo == null) {
        context.invokeNext();
        return;
    }
}

if (rootWindow.getResponseState().getForwardPathInfo() != null) {
    forwardPathInfo = rootWindow.getResponseState().getForwardPathInfo();
}