S/4Hana DDMRP Buffer Levels

Hi together,

I have still problems executing the S/4Hana DDMRP.
The first steps (classifications) work fine.
In a next step, I want to calculate the Buffer Proposals as shown in the screenshot with "Always Adopt Proposals" enabled. The program also runs without errors, but I cannot see calculated Buffer Levels in the apps "Planner Overview" or "Replenishment Planning".

Do you guys by chance know, why there are no Buffer Levels calculated? (I checked in SAP table that e.g. ADU is calculated)

Thanks for your help,

Martin