diff --git a/core/router/router.go b/core/router/router.go
index 7c9897c1..e3b33671 100644
--- a/core/router/router.go
+++ b/core/router/router.go
@@ -97,6 +97,14 @@ func (router *Router) FindClosestPaths(subdomain, searchPath string, n int) []st
 	return list
 }
 
+func (router *Router) buildMainHandler(cPool *context.Pool, requestHandler RequestHandler) {
+	router.mainHandler = func(w http.ResponseWriter, r *http.Request) {
+		ctx := cPool.Acquire(w, r)
+		router.requestHandler.HandleRequest(ctx)
+		cPool.Release(ctx)
+	}
+}
+
 func (router *Router) buildMainHandlerWithFilters(routerFilters map[Party]*Filter, cPool *context.Pool, requestHandler RequestHandler) {
 	sortedFilters := make([]*Filter, 0, len(routerFilters))
 	// key was just there to enforce uniqueness on API level.
@@ -215,11 +223,7 @@ func (router *Router) BuildRouter(cPool *context.Pool, requestHandler RequestHan
 	if routerFilters := routesProvider.GetRouterFilters(); len(routerFilters) > 0 {
 		router.buildMainHandlerWithFilters(routerFilters, cPool, requestHandler)
 	} else {
-		router.mainHandler = func(w http.ResponseWriter, r *http.Request) {
-			ctx := cPool.Acquire(w, r)
-			router.requestHandler.HandleRequest(ctx)
-			cPool.Release(ctx)
-		}
+		router.buildMainHandler(cPool, requestHandler)
 	}
 
 	for i := len(router.wrapperFuncs) - 1; i >= 0; i-- {
diff --git a/iris.go b/iris.go
index cec233bc..695a2191 100644
--- a/iris.go
+++ b/iris.go
@@ -665,7 +665,7 @@ func (app *Application) Build() error {
 
 	if cb := app.OnBuild; cb != nil {
 		if err := cb(); err != nil {
-			return err
+			return fmt.Errorf("build: %w", err)
 		}
 	}
 
@@ -721,16 +721,14 @@ func (app *Application) Build() error {
 		app.view.AddFunc("urlpath", rv.Path)
 		// app.view.AddFunc("url", rv.URL)
 		if err := app.view.Load(); err != nil {
-			app.logger.Errorf("View Builder: %v", err)
-			return err
+			return fmt.Errorf("build: view engine: %v", err)
 		}
 	}
 
 	if !app.Router.Downgraded() {
 		// router
 		if _, err := injectLiveReload(app); err != nil {
-			app.logger.Errorf("LiveReload: init: failed: %v", err)
-			return err
+			return fmt.Errorf("build: inject live reload: failed: %v", err)
 		}
 
 		if app.config.ForceLowercaseRouting {
@@ -747,8 +745,7 @@ func (app *Application) Build() error {
 		routerHandler := router.NewDefaultHandler(app.config, app.logger)
 		err := app.Router.BuildRouter(app.ContextPool, routerHandler, app.APIBuilder, false)
 		if err != nil {
-			app.logger.Error(err)
-			return err
+			return fmt.Errorf("build: router: %w", err)
 		}
 		app.HTTPErrorHandler = routerHandler