Error 201 when downloading Creative Cloud to iMac

I work for a school. and we have Adobe Suite CC installed on all of our machines, with individual Adobe ID's for licensing purposes.

When trying to download Creative Cloud to an iMac, so that I can download an app (AE), I'm getting error 201 after about 10 seconds of download. I've downloaded the Creative Cloud installer, then when I double click the installer, the error keeps coming up.

I'm signed into Adobe ok with my ID.

Does anyone know what this error means? The forum lists other errors but I can't see any details about this one. I have tried a second iMac, and I get the same result.