Hello,

I have a problems with Active Modules Social registration module after upgrade to DNN 05.04.02. I have permanent errors in the log and users can not be logined automatically after rigistration.

Error      An error has occurred.
DotNetNuke.Services.Exceptions.PageLoadException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. ---> System.Web.HttpException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. ---> System.Web.UI.ViewStateException: Invalid viewstate. Client IP: 127.0.0.1 Port: 4908 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 (.NET CLR 3.5.30729) ViewState:ViewState: 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... ---> System.Web.HttpException:Unable to validate data. at System.Web.Configuration.MachineKeySection.GetDecodedData(Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Int32& dataLength) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) --- 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.ViewStateException.ThrowMacValidationError(Exception inner, String persistedState) 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() 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 ---

I have checked machine keys and decription keys of that site for the last year backups and they are same.

Thanks