I get the message "an error occurred while attempting to change modules" when I launch the app on my mac.
Every other adobe app works like Photoshop
I have followed all the troubling shooting steps in the link below, not one of them makes anything different. Except I tried the last one. I created a new account, simply logged in and launched the app and everything ran normally. No problem. However it doesn't say what to do if that works it just says try it.
Obviously this means its going to be an issue with a support file in the one user account but what one?
I also can't un install lightroom either, when I go to the creative cloud plug in on my menu bar the uninstall says its unavailable but the others are fine.
I am having the exact same issue as you are having, have you found a solution for the problem yet?
I just found the answer for me.
I did step 5 on this support article:
It is to repair the permissions on the hidden Library folders.