diff --git a/src/client/web/src/common/localstorage.ts b/src/client/web/src/common/localstorage.ts
index 8701037..6f38d4f 100644
--- a/src/client/web/src/common/localstorage.ts
+++ b/src/client/web/src/common/localstorage.ts
@@ -1,10 +1,35 @@
-export class LocalStorage {
-  static get(key: string): string {
-    const val = window.localStorage.getItem(key);
-    return val && val != "undefined" && val != "null" ? val : "";
+export interface ILocalStorage {
+  get: (key: string) => string;
+  set: (key: string, val: string) => void;
+}
+
+export const errNoLocalStorage = "local storage is not supported";
+
+class LocalStorage {
+  constructor() {}
+
+  get(key: string): string {
+    if (window != null && window.localStorage != null) {
+      const val = window.localStorage.getItem(key);
+      return val && val != "undefined" && val != "null" ? val : "";
+    }
+
+    return "";
   }
-  static set(key: string, val: string): boolean {
-    window.localStorage.setItem(key, val);
-    return true;
+
+  set(key: string, val: string) {
+    if (window != null && window.localStorage != null) {
+      window.localStorage.setItem(key, val);
+    } else {
+      console.error(errNoLocalStorage);
+    }
   }
 }
+
+var localStorage: LocalStorage;
+export const Storage = () => {
+  if (localStorage == null) {
+    localStorage = new LocalStorage();
+  }
+  return localStorage;
+};
diff --git a/src/client/web/src/components/state_mgr.tsx b/src/client/web/src/components/state_mgr.tsx
index a1ef1af..736455e 100644
--- a/src/client/web/src/components/state_mgr.tsx
+++ b/src/client/web/src/components/state_mgr.tsx
@@ -67,7 +67,7 @@ export class StateMgr extends React.Component<Props, State, {}> {
       .initAll(query)
       .then((status: string) => {
         if (status !== "") {
-          alertMsg(getErrMsg(state.msg.pkg, "op.fail", status.toString()));
+          alertMsg(getErrMsg(state.msg.pkg, "op.fail", status));
         }
         this.update(updater().updateAll);
       });
diff --git a/src/client/web/src/components/state_updater.ts b/src/client/web/src/components/state_updater.ts
index a925525..c62b851 100644
--- a/src/client/web/src/components/state_updater.ts
+++ b/src/client/web/src/components/state_updater.ts
@@ -31,7 +31,6 @@ import { SettingsClient } from "../client/settings";
 import { UploadEntry, UploadState } from "../worker/interface";
 import { Up } from "../worker/upload_mgr";
 import { alertMsg } from "../common/env";
-import { LocalStorage } from "../common/localstorage";
 import { controlName as panelTabs } from "./root_frame";
 import { settingsTabsCtrl } from "./dialog_settings";
 import { settingsDialogCtrl } from "./layers";
@@ -371,10 +370,7 @@ export class Updater {
   };
 
   initStateForVisitor = async (): Promise<any> => {
-    const statuses = await Promise.all([
-      this.getClientCfg(),
-      this.syncIsSharing(this.props.filesInfo.dirPath.join("/")),
-    ]);
+    const statuses = await Promise.all([this.getClientCfg()]);
     if (statuses.join("") !== "") {
       return statuses.join(";");
     }
@@ -449,22 +445,30 @@ export class Updater {
       return isAuthedStatus;
     }
 
-    const statuses = await Promise.all([this.self(), this.initCwd(params)]);
-    if (statuses.join("") !== "") {
-      return statuses.join(";");
-    }
-
-    this.initUITree();
-    const syncCwdStatus = await this.syncCwd();
-    if (syncCwdStatus !== "") {
-      return syncCwdStatus;
-    }
-
     const getCapStatus = await this.getCaptchaID();
     if (getCapStatus !== "") {
       return getCapStatus;
     }
 
+    const selfStatuses = await Promise.all([this.self(), this.initCwd(params)]);
+    if (selfStatuses.join("") !== "") {
+      return selfStatuses.join(";");
+    }
+
+    this.initUITree();
+
+    const cwdStatus = await this.syncCwd();
+    if (cwdStatus !== "") {
+      return cwdStatus;
+    }
+
+    const isSharingStatus = await this.syncIsSharing(
+      this.props.filesInfo.dirPath.join("/")
+    );
+    if (isSharingStatus !== "") {
+      return isSharingStatus;
+    }
+
     if (this.props.login.userRole === roleAdmin) {
       return this.initStateForAdmin();
     } else if (this.props.login.userRole === roleVisitor) {
@@ -500,6 +504,7 @@ export class Updater {
 
   self = async (): Promise<string> => {
     const resp = await this.usersClient.self();
+
     if (resp.status === 200) {
       this.props.login.userID = resp.data.id;
       this.props.login.userName = resp.data.name;
@@ -508,7 +513,10 @@ export class Updater {
       this.props.login.quota = resp.data.quota;
       this.props.login.preferences = resp.data.preferences;
       return "";
+    } else if (resp.status === 401) {
+      return "";
     }
+
     this.resetUser();
     return errServer;
   };
diff --git a/src/client/web/src/i18n/en_US.ts b/src/client/web/src/i18n/en_US.ts
index d63b4e6..22e71a6 100644
--- a/src/client/web/src/i18n/en_US.ts
+++ b/src/client/web/src/i18n/en_US.ts
@@ -113,4 +113,9 @@ export const msgs: Map<string, string> = Map({
   "control.settingsTabs.preferencePane": "Preference",
   "upload.add.fail": "Some files conflict with uploading files, please check.",
   "server.fail": "The operation failed in the server",
+  "err.updater": "updater error",
+  "err.uploadMgr": "upload Manager error",
+  "err.server": "The operation failed in the server",
+  "err.script.cors": "script error with CORS",
+  "err.unknown": "unknown error",
 });
diff --git a/src/client/web/src/i18n/zh_CN.ts b/src/client/web/src/i18n/zh_CN.ts
index eb392eb..0bd9713 100644
--- a/src/client/web/src/i18n/zh_CN.ts
+++ b/src/client/web/src/i18n/zh_CN.ts
@@ -110,5 +110,9 @@ export const msgs: Map<string, string> = Map({
   "control.settingsTabs.managementPane": "管理",
   "control.settingsTabs.preferencePane": "设置",
   "upload.add.fail": "有些文件与上传任务冲突，请检查",
-  "server.fail": "操作在服务器端失败",
+  "err.updater": "updater错误",
+  "err.uploadMgr": "upload Manager错误",
+  "err.server": "服务器端操作失败",
+  "err.script.cors": "跨域脚本错误",
+  "err.unknown": "未知错误",
 });