On both of my Macs now, when I click on the Download macOS option on the left, the app crashes.
On one of my Mac, it was once working again after asking the Mac password again, but now I can’t make it. Even uninstalling and re-installing doesn’t solve anything.
This is because of Python 2 being removed in macOS 12.3. The Download macOS functionality in MDS relied on a Python script.
In the latest beta of MDS (currently in QA testing), this functionality has been replaced by integrating mist which is written in Swift instead of Python. You can download the latest MDS beta here: twocanoes / macdeploystick / Downloads — Bitbucket