Driver panel display issue

Hello,

I am trying to create a custom event, and I understand that this requires modifying the behavior of the Altair driver by changing its input file. However, I'm facing an issue—when I attempt to view the Altair driver's panel, nothing is displayed (please see the attached picture). As a result, I am unable to modify the driver.

Could you please advise on how I can get the Altair driver's panel to display correctly or guide me on how to create a custom event?

Thank you in advance for your help.

Have a nice day!