Generation of a Viewpoint in Capella studio

I’m still new to Capella and Capella Studio and trying to get used to it. I’m currently following the COST example tutorial available on this link .
I have a problem with
the generation and run of the Viewpoint and can’t seem to understand where it comes from. When I run my Viewpoint, an
Capella window opens instead of a window with the diagram. And this is the error message i get :
Best regards,

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