1.Now when I visit pages, getting below issue:
"
{"Message":"An error has occurred.","ExceptionMessage":"The 'ObjectContent`1' type failed to serialize the response body for content type 'application/json; charset=utf-8'.","ExceptionType":"System.InvalidOperationException","StackTrace":null,"InnerException":{"Message":"An error has occurred.","ExceptionMessage":"Object reference not set to an instance of an object.","ExceptionType":"System.NullReferenceException","StackTrace":" at DotNetNuke.Entities.Tabs.TabInfo.get_FullUrl()\r\n at Dnn.PersonaBar.Pages.Components.Converters.ConvertToPageItem[T](TabInfo tab, IEnumerable`1 portalTabs)\r\n at"

2. On visiting Users page getting below exception:
" Message":"An error has occurred.","ExceptionMessage":"Error getting value from 'AvatarUrl' on 'Dnn.PersonaBar.Users.Components.Dto.UserBasicDto2'.","ExceptionType":"Newtonsoft.Json.JsonSerializationException","StackTrace":" at Newtonsoft.Json.Serialization.DynamicValueProvider.GetValue(Object target)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.CalculatePropertyValues(JsonWriter writer, Object value, JsonContainerContract contract, JsonProperty member, JsonProperty property, JsonContract& memberContract, Object& memberValue)\
"

3. http://dev.plannetmarketing.me/API/PersonaBar/Page... returns below exception:
"InnerException":{"Message":"An error has occurred.","ExceptionMessage":"Value cannot be null.\r\nParameter name: portalSettings","ExceptionType":"System.ArgumentNullException","StackTrace":" at DotNetNuke.Entities.Urls.AdvancedFriendlyUrlProvider.FriendlyUrl(TabInfo tab, String path, String pageName, PortalSettings portalSettings)\r\n at DotNetNuke.Services.Url.FriendlyUrl.DNNFriendlyUrlProvider.FriendlyUrl(TabInfo tab, String path, String pageName, PortalSettings settings)\r\n at DotNetNuke.Common.Globals.FriendlyUrl(TabInfo tab, String path, String pageName)\r\n at DotNetNuke.Common.Globals.NavigateURL(Int32 tabID, Boolean isSuperTab, PortalSettings settings, String controlKey, String language, String pageName, String[] additionalParameters)\r\n"