If so, you need SAP Universal ID. In a few months, SAP Universal ID will be the only option to login to SAP Community. Without it, you will lose your content and badges. If you have multiple accounts, use the Consolidation Tool to merge your content.
I installed SAP PPM 5.0 and create a user for PPM with the right roles. If I log in the System with the NWBC (SAP Business Client) I get the following error: