Hello

I am getting page load exception, InnerException: The state information is invalid for this page and might be corrupted. The page seem to load each time for me.    It mentions that I might have an invalid view state, which I understand is generated automatically.  I am using DNN verson 4.5.3

AssemblyVersion: 04.05.03
PortalID: 0
PortalName: DrivewayDesign | For Quality Driveway + Patio Creations - Liverpool
UserID: -1
UserName:
ActiveTabID: 78
ActiveTabName: Driveway
RawURL: /Driveway.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer: http://www.drivewaydesign.eu/Driveway.aspx
UserAgent: Opera/9.0 (Windows NT 5.1; U; en)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 3da06ceb-a482-4704-b14c-4937186e144d
InnerException: The state information is invalid for this page and might be corrupted.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.Convert.FromBase64String
StackTrace:
Message: DotNetNuke.Services.Exceptions.PageLoadException: The state information is invalid for this page and might be corrupted. ---> System.Web.HttpException: The state information is invalid for this page and might be corrupted. ---> System.Web.UI.ViewStateException: Invalid viewstate. Client IP: 64.207.49.240 Port: 3062 User-Agent: Opera/9.0 (Windows NT 5.1; U; en) ViewState: /wEPDwUKLTIyODM3NTczMw9kFgZmDxYCHgRUZXh0BXk8IURPQ1RZUEUgaHRtbCBQVUJMSUMgIi0vL1czQy8vRFREIFhIVE1MIDEuMCBUcmFuc2l0aW9uYWwvL0VOIiAiaHR0cDovL3d3dy53My5vcmcvVFIveGh0bWwxL0RURC94aHRtbDEtdHJhbnNpdGlvbmFsLmR0ZCI 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... ---> System.FormatException: Invalid length for a Base-64 char array. at System.Convert.FromBase64String(String s) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState) at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState) at System.Web.UI.HiddenFieldPageStatePersister.Load() --- End of inner exception stack trace --- --- End of inner exception stack trace --- at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError) at System.Web.UI.HiddenFieldPageStatePersister.Load() at System.Web.UI.Page.LoadPageStateFromPersistenceMedium() at System.Web.UI.Page.LoadAllState() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace ---
Source:
Server Name: MS001

Any suggestons how I might resolve this issue, or what might be causing it.

Thanks

Lynn