PLAXIS Calculation Manager is not poping out

Hi,

I tried to open Plaxis Calculation Manager from both Plaxis 2D Input (Ver. 20.04.00.790) from my computer but when I clicked the Calculation Manager trom Expert menu. There is no calculation manager window poping out.

I have checked that I have the geotechnical Select Entitlements turned on in my license ( i can see the icon is blue in Help/ About)

Could you please help me on how to activate my calculation manager?

Thank you.