Why is the Start Page for App Designer and Simulink Blank or Unresponsive in R2021a?

I am unable to open App Designer Start Page properly in R2021a.  After running the command below, I see a blank frame, and App Designer fails to open.

>> appdesigner

This same issue occurs when I launch the Simulink Start Page

>> simulink

or try to open a "uifigure"

>> uifigure

I can use R2020b without any issue on the same computer.

I am not using a proxy server, and I have ensured that my Windows OS and Graphics driver are up to date.

How can I resolve this issue?

Answer 1

[MathWorks Support Team]

This is a known bug with R2021a in certain environments.  Please refer to the Bug Report linked below for fixes and workarounds.

• https://mathworks.com/support/bugreports/2498956