We have noted that after installing the update AutoCAD Plant 3D 2022.1 it was not possible to open an AutoCAD Plant 3D-Vault-project anymore. Plant 3D 2022 shows the message: “Subscribe to Autodesk BIM Collaborate Pro” dialog, when no valid Autodesk account is signed in.
This is solved by a hotfix. Reach out to this article to get it.