If you click the "more" button, you should be able to get some more information. You can also check your task manager to see if star.exe is doing anything.
All the best,
Some more information here would be helpful.
Does this happen on all models?
Has it always happened?
As screenshot if what you are seeing ?
How many dof, what elements are included in your analysis.
But if you look at processes and ram and CPU are still moving for the solver, it is still working.