Oops, add the file

src/components/views/globals/ServerLimitBar.js

@@ -0,0 +1,32 @@
+/*
+Copyright 2018 New Vector Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from 'react';
+import sdk from '../../../index';
+import { _t } from '../../../languageHandler';
+
+export default React.createClass({
+    render: function() {
+        const toolbarClasses = "mx_MatrixToolbar mx_MatrixToolbar_error";
+        return (
+            <div className={toolbarClasses}>
+                <div className="mx_MatrixToolbar_content">
+                    { _t("This homeserver has hit its Monthly Active User limit. Please contact your service administrator to continue using the service.") }
+                </div>
+            </div>
+        );
+    },
+});