Mathcad Prime11 Installs successfully, opens with splash screen then displays a blank white box

I am assisting a client with computer migration for their firm.  While migrating 9 users/devices to new Dell Precision Workstations with Windows 11 Pro, 8GB GPU, 32GB RAM, I7 CPU, I have encountered an issue with 2 workstations that have this same issue.  I have activated the device licenses successfully and no matter how many uninstalls/reinstalls, removal of PTC folders etc, the software for only these two brand new devices fails to launch in a usable program window.

What is interesting is if I click around on random areas of the white program box I can get some program menus to respond and appear above the white screen (See last pic)

Any advice would be appreciated.

Thank you