Visualisation does not work anymore

I can get a visualisation of an instance of a class within the data exploration area:

However, clicking on "open in new workspace tab" does not open the viz but only the construct query and the result set:

Whenever I run a query, clicking on "Viz" only shows the resulting RDF.

This behavior described only happens on one of my servers; everything works as expected on the other server. Saying that, the setup of both servers should exactly been the same and everything had worked on the problematic machine a couple of days ago. I am sort of puzzled ...

Upgrading to 7.7.3 solved the issue on my end