Importing DyLOS Factory Content :: Missing Content

recently I wanted to try Dylos and downloaded the newest version of Onyx and the HD Factory Content Package.

after opening the demo show file and importing the Factory Content iI got a warning that 557 Files from the Content are missing. I already tried importing/downloading the content again.

What else can I do to fix this issue?

This is the Error I get:

Onyx Error

Edit: after reinstalling Onyx and reimporting the Factory Cotent I had 330 Files missing. And after a resync I have 466 Files Missing.