Supplement and complement:
Much to my surprise, I received completely unsolicited another package of "HandyNow.shop", the supplier of the power supply with a new replacement unit a few days ago. A very nice letter to the company in which apologized for quality errors.
The now superseded same power supply meets the expected function fully.
This is professional customer service and amazing with such a cheap product.
Hats off and compliments to "HandyNow.shop" - I can only recommend.
Many Thanks!