When i am trying to browse i am getting the domain mapping incorrect error?

Unable to find a matching sales channel for the request: http://localhost/". Please make sure the domain mapping is correct. $salesChannel = $this->findSalesChannel($request); if ($salesChannel === null) { // this class and therefore the “isSalesChannelRequired” method is currently not extendable // which can cause problems when adding custom paths throw new SalesChannelMappingException($request->getUri()); }