Unfortunately yes (I just retested).
I think it's not domoticz that is involved, but my syno.
Something is killing the process.
Unfortunately no help waiting for syno support :(

EDIT:
In the end I uninstalled and reinstalled python.
This time it shows me version 3.5.1-0108. And there miracle, it ...

Thank you for this quick response.

Python 3.5.6-8 is installed correctly

cordially

Hello,

If I install Domotics without python on my synology DS715, it works.
On the other hand, if I install the package with python, the launching tries to be done then fails.
I requested assistance from Synology which (of course) let me know that no assistance was planned for non synology packages ...