diff -up evolution-3.28.5/src/e-util/e-misc-utils.c.webkitgtk-2.28 evolution-3.28.5/src/e-util/e-misc-utils.c
--- evolution-3.28.5/src/e-util/e-misc-utils.c.webkitgtk-2.28	2020-06-11 15:56:03.324428384 +0200
+++ evolution-3.28.5/src/e-util/e-misc-utils.c	2020-06-11 15:56:03.334428384 +0200
@@ -3633,7 +3633,7 @@ e_util_claim_dbus_proxy_call_error (GDBu
 	g_return_if_fail (method_name != NULL);
 
 	if (in_error && !g_error_matches (in_error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
-		g_warning ("Failed to call a DBus Proxy method %s::%s: %s",
+		printf ("Failed to call a DBus Proxy method %s::%s: %s\n",
 			g_dbus_proxy_get_name (dbus_proxy), method_name, in_error->message);
 }
 
diff -up evolution-3.28.5/src/e-util/e-web-view.c.webkitgtk-2.28 evolution-3.28.5/src/e-util/e-web-view.c
--- evolution-3.28.5/src/e-util/e-web-view.c.webkitgtk-2.28	2018-07-30 15:37:05.000000000 +0200
+++ evolution-3.28.5/src/e-util/e-web-view.c	2020-06-11 15:57:24.375430212 +0200
@@ -1221,6 +1221,9 @@ web_view_initialize (WebKitWebView *web_
 		g_object_unref (settings);
 }
 
+static void
+web_view_load_uri (EWebView *web_view,
+                   const gchar *uri);
 
 static void
 web_view_constructed (GObject *object)
@@ -1265,6 +1268,9 @@ web_view_constructed (GObject *object)
 	web_view_initialize (WEBKIT_WEB_VIEW (object));
 
 	web_view_set_find_controller (E_WEB_VIEW (object));
+
+	/* Initialize the WebPage content for WebKitGTK 2.28 */
+	web_view_load_uri (E_WEB_VIEW (object), NULL);
 }
 
 static void