YOu can still open the release notes:
https://docs.mendix.com/releasenotes/studio-pro/8.2
There you can find this message:
We have decided to retract versions 8.2.0 and 8.2.1 due to an issue related to committing new objects with a one-to-one association in combination with autocommit behavior. This will be fixed in 8.2.2.
Mendix 8.2.2 is now available