Web Part Error: An error has occurred.
Error Details:
[ArgumentException: The serialized data is invalid.]
at System.Web.UI.ObjectStateFormatter.Deserialize(Stream inputStream)
at Microsoft.SharePoint.WebPartPages.Utility.DeserializeByteArrayToObject(Byte[] bytes)
at Microsoft.SharePoint.WebPartPages.BinaryWebPartDeserializer.LoadInitialWebPart()
at Microsoft.SharePoint.WebPartPages.BinaryWebPartDeserializer.Deserialize()
at Microsoft.SharePoint.WebPartPages.SPWebPartManager.CreateWebPartsFromRowSetData(Boolean onlyInitializeClosedWebParts)
[TypeLoadException: Could not load type 'ILSI.SharePoint.ListSearch.FindActivityResults.FindActivityResults+ActivityType' from assembly 'ILSI.SharePoint.ListRollup, Version=1.0.0.0, Culture=neutral, PublicKeyToken=db5ac39a3b5da9ec'.]
at System.RuntimeTypeHandle._GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, Boolean loadTypeFromPartialName)
at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark)
at System.RuntimeType.PrivateGetType(String typeName, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark)
at System.Type.GetType(String typeName, Boolean throwOnError)
at System.Web.UI.ObjectStateFormatter.DeserializeType(SerializerBinaryReader reader)
at System.Web.UI.ObjectStateFormatter.DeserializeValue(SerializerBinaryReader reader)
at System.Web.UI.ObjectStateFormatter.DeserializeValue(SerializerBinaryReader reader)
at System.Web.UI.ObjectStateFormatter.Deserialize(Stream inputStream)