Fix #4028: check whether the user info is null.
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		| @ -545,7 +545,7 @@ | ||||
|             url = PageState.Alias.Path; | ||||
|         } | ||||
|  | ||||
|         if (PageState.Runtime == Shared.Runtime.Hybrid) | ||||
|         if (PageState.Runtime == Shared.Runtime.Hybrid && PageState.User != null) | ||||
|         { | ||||
|             // hybrid apps utilize an interactive logout | ||||
|             await UserService.LogoutUserAsync(PageState.User); | ||||
| @ -564,8 +564,8 @@ | ||||
|  | ||||
|     private void LoadSettingsAsync() | ||||
|     { | ||||
|         _category = SettingService.GetSetting(PageState.User.Settings, settingCategory, "Common"); | ||||
|         var pane = SettingService.GetSetting(PageState.User.Settings, settingPane, ""); | ||||
|         _category = SettingService.GetSetting(PageState.User?.Settings, settingCategory, "Common"); | ||||
|         var pane = SettingService.GetSetting(PageState.User?.Settings, settingPane, ""); | ||||
|         if (PageState.Page.Panes.Contains(pane)) | ||||
|         { | ||||
|             _pane = pane; | ||||
| @ -585,10 +585,13 @@ | ||||
|  | ||||
|     private async Task UpdateSettingsAsync() | ||||
|     { | ||||
|         Dictionary<string, string> settings = await SettingService.GetUserSettingsAsync(PageState.User.UserId); | ||||
|         settings = SettingService.SetSetting(settings, settingCategory, _category); | ||||
|         settings = SettingService.SetSetting(settings, settingPane, _pane); | ||||
|         await SettingService.UpdateUserSettingsAsync(settings, PageState.User.UserId); | ||||
|         if (PageState.User != null) | ||||
|         { | ||||
|             Dictionary<string, string> settings = await SettingService.GetUserSettingsAsync(PageState.User.UserId); | ||||
|             settings = SettingService.SetSetting(settings, settingCategory, _category); | ||||
|             settings = SettingService.SetSetting(settings, settingPane, _pane); | ||||
|             await SettingService.UpdateUserSettingsAsync(settings, PageState.User.UserId); | ||||
|         } | ||||
|     } | ||||
|  | ||||
|     private void ClearMessage() | ||||
|  | ||||
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