Web Part Error: Access denied. You do not have permission to perform this action or access this resource.

Error Details:
[UnauthorizedAccessException: <nativehr>0x80070005</nativehr><nativestack></nativestack>]
  at Microsoft.SharePoint.Library.SPRequest.GetListsWithCallback(String bstrUrl, Guid foreignWebId, String bstrListInternalName, Int32 dwBaseType, Int32 dwBaseTypeAlt, Int32 dwServerTemplate, UInt32 dwGetListFlags, UInt32 dwListFilterFlags, Boolean bPrefetchMetaData, Boolean bSecurityTrimmed, Boolean bGetSecurityData, Boolean bPrefetchRelatedFields, ISP2DSafeArrayWriter p2DWriter, Int32& plRecycleBinCount)
  at Microsoft.SharePoint.SPListCollection.EnsureListsData(Guid webId, String strListName)
  at Microsoft.SharePoint.SPListCollection.ItemByInternalName(Guid webId, String listName)
  at Microsoft.SharePoint.WebPartPages.SPWebPartManager.FixupListWebParts(WebPart part, Type type, Boolean isClosed)