Panorama creation tool in DK

[CD]

Hi,

with Digikam 5.6 under latest Arch/Manjaro/KDE the panorama tool does 
not work. pto2mk and autooptimizer can not be found. Hugin has version 
2017.0-1.

I did downgrade to hugin-2016.2.0-6-x86_64.pkg.tar.xz: no missing 
components, but different error occure that CPfind is not able ...

This old version :hugin-2014.0.0-8-x86_64.pkg.tar.xz did not work either 
from Digikam.

Here my question: Which Hugin version work with digikam 5.6?

Best regards

Christian