Dang it! Started to look and see if I could get Vendr v2 to run on v10 without needing to upgrade my minimum Umbraco dependency and straight out the gates,

ConfigurationEditor_T

has moved DLL so there is no option but to update 🤦‍♂️ Essentially the same issue as

IScopeProvider

moving DLL which required this to become

ICoreScopeProvider