Hi Support,
I'm attempting to migrate our ProGet instance from Docker to a dedicated Windows 2019 Virtual Machine.
I've installed ProGet 6.0.13 (same as docker version) from InedoHub and backup/restored the database and updated the advanced settings with all the correct directories.
All is functioning correctly on the new VM apart from the extensions, I'm getting the following error when ProGet is trying to load them:

System.Runtime.Serialization.InvalidDataContractException: Type 'Inedo.Extensibility.UpackMetadata' cannot be serialized. Consider marking it with the DataContractAttribute attribute, and marking all of its members you want serialized with the DataMemberAttribute attribute. If the type is a collection, consider marking it with the CollectionDataContractAttribute. See the Microsoft .NET Framework documentation for other supported types. at System.Runtime.Serialization.DataContract.DataContractCriticalHelper.ThrowInvalidDataContractException(String message, Type type) at System.Runtime.Serialization.DataContract.DataContractCriticalHelper.CreateDataContract(Int32 id, RuntimeTypeHandle typeHandle, Type type) at System.Runtime.Serialization.DataContract.DataContractCriticalHelper.GetDataContractSkipValidation(Int32 id, RuntimeTypeHandle typeHandle, Type type) at System.Runtime.Serialization.Json.DataContractJsonSerializer.get_RootContract() at System.Runtime.Serialization.Json.DataContractJsonSerializer.InternalIsStartObject(XmlReaderDelegator reader) at System.Runtime.Serialization.Json.DataContractJsonSerializer.InternalReadObject(XmlReaderDelegator xmlReader, Boolean verifyObjectName) at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver) at System.Runtime.Serialization.Json.DataContractJsonSerializer.ReadObject(XmlDictionaryReader reader) at Inedo.Extensibility.ExtensionsVerifier.VerifyExtensionInternal(String bmxFileName, String shadowRoot, IEnumerable1 sdkAssemblyNames, AssemblyName coreAssemblyName, Version minimumAllowedVersion)`
I've checked the file permissions and "NETWORK SERVICE" has full control permissions to the extensions directory
Thanks
Simon