D365fO: Error - Enum type 'RetailChannelAttributeModifier' for the field 'Modifier' is not found.

Error Path: [dynamics://View/RetailSalesTableChannelAttributeView]: Enum type 'RetailChannelAttributeModifier' for the field 'Modifier' is not found. C:\AOSService\PackagesLocalDirectory\ApplicationSuite\Foundation\AxView\RetailSalesTableChannelAttributeView.xml

This error indocates that the model you're working with needs a reference to the model Retail.