Unable to Save game.

Unable to save the game. This occurred around the time of the 1.207 update. Here the log file lines on the error happened during saving.

2025-09-10 16:46:06.442 - Thread: 1 -> TakeOver: Updating sound on block 124717153306699935, on grid Encounter Pirate Raider, working: False, functional: True, npc owned: True

2025-09-10 16:46:06.486 - Thread: 9 -> Error: C:\Users\Bob\AppData\Roaming\SpaceEngineers\Saves\76561198049433298\PC First Home World Survival Without MES\.new/SANDBOX_0_0_0_.sbs failed to serialize.

2025-09-10 16:46:06.492 - Thread: 9 -> System.InvalidOperationException: There was an error generating the XML document. ---> System.InvalidOperationException: There was an error generating the XML document. ---> System.InvalidOperationException: There was an error generating the XML document. ---> System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.

at System.ThrowHelper.ThrowKeyNotFoundException()

at System.Collections.Generic.Dictionary`2.get_Item(TKey key)

at VRage.Utils.MyStringHash.get_String()

at VRage.Utils.MyStringHash.WriteXml(XmlWriter writer)

at System.Xml.Serialization.XmlSerializationWriter.WriteSerializable(IXmlSerializable serializable, String name, String ns, Boolean isNullable, Boolean wrapped)

at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write5612_Item(String n, String ns, MyObjectBuilder_LargeMissileTurret o, Boolean isNullable, Boolean needType)

at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write7830_Item(Object o)

at Microsoft.Xml.Serialization.GeneratedAssembly.MyObjectBuilder_LargeMissileTurretSerializer.Serialize(Object objectToSerialize, XmlSerializationWriter writer)

at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)

--- End of inner exception stack trace ---

at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)

at VRage.MyXmlSerializerBase`1.WriteXml(XmlWriter writer)

at System.Xml.Serialization.XmlSerializationWriter.WriteSerializable(IXmlSerializable serializable, String name, String ns, Boolean isNullable, Boolean wrapped)

at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write3756_MyObjectBuilder_CubeGrid(String n, String ns, MyObjectBuilder_CubeGrid o, Boolean isNullable, Boolean needType)

at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write6337_MyObjectBuilder_CubeGrid(Object o)

at Microsoft.Xml.Serialization.GeneratedAssembly.MyObjectBuilder_CubeGridSerializer.Serialize(Object objectToSerialize, XmlSerializationWriter writer)

at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)

--- End of inner exception stack trace ---

at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)

at VRage.MyXmlSerializerBase`1.WriteXml(XmlWriter writer)

at System.Xml.Serialization.XmlSerializationWriter.WriteSerializable(IXmlSerializable serializable, String name, String ns, Boolean isNullable, Boolean wrapped)

at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write2808_MyObjectBuilder_Sector(String n, String ns, MyObjectBuilder_Sector o, Boolean isNullable, Boolean needType)

at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write6392_MyObjectBuilder_Sector(Object o)

at Microsoft.Xml.Serialization.GeneratedAssembly.MyObjectBuilder_SectorSerializer.Serialize(Object objectToSerialize, XmlSerializationWriter writer)

at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)

--- End of inner exception stack trace ---

at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)

at System.Xml.Serialization.XmlSerializer.Serialize(Stream stream, Object o, XmlSerializerNamespaces namespaces)

at VRage.ObjectBuilders.Private.MyObjectBuilderSerializerKeen.SerializeXML(String path, Boolean compress, MyObjectBuilder_Base objectBuilder, UInt64& sizeInBytes, Type serializeAsType)

2025-09-10 16:46:06.551 - Thread: 9 -> Session snapshot save - END

2025-09-10 16:46:06.561 - Thread: 1 -> SaveFinished: failed to save the world at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)

Thank you for any help you can give me.

Bob