Hi everyone,
Thanks for your patience here. If you did end up upgrading and are getting the results posted by some users in this thread. I suggest the following workaround.Please note you may have to upload your files and create a new build script.
Update to the latest version of Addressables:
"com.unity.addressables": "1.21.9",
Go to Window > Asset Management > Addressables > Profiles
In the profiles window click on Create and select Build and Load Path Variables
Name your prefix and click Save
While in the profile window, Select the profile you are using with your project and use the dropdown to select your bucket/environment from Cloud Content Delivery.
Go to Window > Asset Management > Addressables > Settings
Make sure your Build and load paths point to the new settings
Go to Window > Asset Management > Addressables > Groups
Click on you Addressables group you want to load and under Content Packing and Loading select the new settings
When complete, you can now build directly to CCD by clicking on the Build To CCD drop down and selecting Default Build script or try to update a previous build.
Hope this workaround works for the folks who reported this problem.
Best,
Seb