What's the actual error message you're getting?
Also, what version of AIR do you currently have installed?
Are you able to uninstall your current version of AIR before installing v33.1.1.744?
I'm not sure if this is still relevant, but according to this web page:
Remove the runtime on a Mac computer
Double-click the “Adobe AIR Uninstaller”, which is located in the /Applications/Utilities folder.
If you can't uninstall your current version of AIR, maybe you could upgrade AIR first (to v50.2.4.1) in order to uninstall it?
Seems like a roundabout way to do things but if things aren't working at the moment, it might be worth a try.
Both AIR v33.1.1.744 and AIR v50.2.4.1 can be found on Harman's download page here.
Also, are you using Rosetta 2?
Sorry for all the questions but a little more information might help to pinpoint the cause of the problem.
In the meantime, maybe a Sonoma user can chime in with some useful info...