On the homepage of your environment, you can click Modules on the left-hand side. The different modules will then appear as green tiles. Click the General tile.
You can now find Configuration at the bottom left.
The different settings for the "Certification" section are described below.
Certification module version: V1 is the old version and is no longer used. This setting only served as a temporary solution. It can therefore be set to V2. The V1 option will be removed soon, after which this will be set to V2 by default in every environment.