I click download of creative cloud or photoshop. It goes through the motions of downloading but once it gets to 100%, the window closes out and everything disappears. I'm running Big Sur 11.0.1 on a 2018 MacBook Air. Not sure what I'm doing wrong.
I am sorry I don't have a way to help. But you are not alone. I am running Big Sur on an iMac (2014). Creative Cloud was installed and running properly before the upgrade to Big Sur. After, I was unable to get Creative Cloud to run until I ran the uninstall program. When I did that Creative Cloud uninstaller prompted me to run the "repair" module. I did that and was able to get Creative Cloud to launch and run. It shows me the programs that I have installed but will not allow me to launch them. I have tried to uninstall the program (Acrobat) but even the uninstaller will not run. So I am stuck at this point. As far as I can tell Adobe maintains that Acrobat is compatible with Big Sur running on an intel based Apple computer but the proof is in the pudding. At this stage of the Big Sur roll out there doesn't seem to be much support in this community for folks with our problem. So far the "support" consists mostly of scolding me for updating to Big Sur in the first place.
I would have thought Apple would have worked more closely with Adobe to make sure the existing Intel based Adobe apps were functional under Big Sur. It doesn't appear to be the case. I have several other Macs that I use, one too old to run Big Sur, but I will not take a chance on the other iMac I use. That one will stay as it is until the compatibility issues are resolved.