Creative Cloud update failed. Unable to update the application. Error code: 120.

Thanks for posting, ​@Blissful_Glaze8a5c, and thank you to ​@Peru Bob for providing the correct troubleshooting document. The steps in that article are the recommended resolution for Error 120. 

I also reviewed the account details associated with your community profile and can confirm that a Creative Cloud Files Storage subscription was started and canceled on September 1.

Were you able to complete the steps in the document that Peru Bob shared?

If so, are you still seeing Error 120 when attempting to update Creative Cloud, or has the issue been resolved?

If the error continues, please reply with any current error messages or screenshots (excluding personal information), and we'll be happy to help investigate further, ​@Blissful_Glaze8a5c.

See here:

https://helpx.adobe.com/download-install/apps/troubleshoot/error-codes-100-149/error120.html