Excel import does not notify user when trying to import values for a non-existing project

we encountered some problems with the following steps:
export all resources to excel
changing the project name from A.B.csproj to A.B.C.csproj
import resources from excel

The excel import tried to import all the resources into project A.B again (perfectly fine) but when this project does not exist, the user gets no notification at all. we managed to find this error by debugging the extension.

This is obviously a user error but it would be convenient to have a notification of some sorts that tells me i'm trying to import resources into non existing projects.