Error in Domain Model

I am trying to make the mailing system inside my app, and I downloaded some mail template from the marker. In earlier versions of Mendix, I could see the model, but in 7.23.7 version I am getting an error message and big red x over the model. I can still use the entities from that model, just can't see them or edit them. Is there any way to fix this or I just need to open an earlier version of the modeler and recreate the domain model in 7.23.7.
1 answers

The same issue was I in the last versions, too. You should create a Bug report to mendix on the Support Page. .