Much faster (hopefully), smaller (mostly) and better PMS builds preview (1.15.0.573-123756e9a)

I have manually installed the ARMv8 (x18 Series) for Synology on my Synology DS218, but when I try to launch it, it says “Launch of package assistance failed.”. I have also tried to reboot the Nas but nothing change.
P.S. First of all I try installing the versione that I have found here “ARMv8 platform alpha testing - Synology and QNAP”, but it doesn’t work (the problem that I have exposed early). Then I read all the post and discover this post, and I have update the package with the version of this post, but it happens the same issue.