Hi,
I followed the same steps as suggested by you but the result is very similar:
<faultstring xml:lang="en-US">System.InvalidOperationException: There is an error in XML document (4849, 36). ---> System.InvalidOperationException: Instance validation error: 'IsBPFEntityCustomizationFeatureEnabled' is not a valid value for OrganizationSettingRuleTypeSetting.
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderRibbonDefinitions.Read90_Item(String s)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderRibbonDefinitions.Read91_OrganizationSettingRuleType(Boolean isNullable, Boolean checkType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderRibbonDefinitions.Read110_DisplayRulesTypeDisplayRule(Boolean isNullable, Boolean checkType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderRibbonDefinitions.Read111_DisplayRulesType(Boolean isNullable, Boolean checkType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderRibbonDefinitions.Read115_RuleDefinitionsGlobalType(Boolean isNullable, Boolean checkType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderRibbonDefinitions.Read125_RibbonDefinition(Boolean isNullable, Boolean checkType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderRibbonDefinitions.Read126_RibbonDefinitions(Boolean isNullable, Boolean checkType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderRibbonDefinitions.Read127_RibbonDefinitions()
--- End of inner exception stack trace ---
at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)
at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle)
at Develop1.Xrm.Silverlight.Ribbon.Model.RibbonsModel.UnpackEntityRibbon(IDictionary`2 coreEntityRibbonXml, XElement solutionRibbonDiffXmlElement, String entityLogicalName)
at RWB2016.Plugins.RibbonCustomisationsPlugin.GetRibbonJSON(LocalPluginContext localContext, ITracingService trace, String inputData)
at SparkleXrm.Plugins.Plugin.Execute(IServiceProvider serviceProvider):Instance validation error: 'IsBPFEntityCustomizationFeatureEnabled' is not a valid value for OrganizationSettingRuleTypeSetting.</faultstring>