@jthomas666:
indeed I discovered my outdated profile settings after posting my question.
You saw the old version right before I changed them to the correct current values.
So, no need to be sorry


@stefan:
this is not the issue.
I installed Ofice 2019 straight away and I did verify that no compatibility options were set. Also, I verified that it (originally) did not run elevated.
Troubleshooting compatibility does not help. If it did, I would be very surprised, since I run it in the most current version of Windows 10.
I now run it on purpose in elevated mode, because then the error does not pop up ...



My guess is that somewhere under the hood som extra privileges are required for the use of macro's. Since the later versions of Office do not have the possibility to "change" the installation, I have no clues whatsoever where to search ...


Anyway, thank you very much for helping!