Troubles at install OpenMediaVault 4 on GoFlexNet

Hello guys!!
I'm trying to install OpenMediaVault 4 on my GoFlexNet.
I have an image with Debian stretch 9 from doozan and after many trials that one is set.
I want my box to run OMV and I'd like to have the latest one.
I followed the instructions on your install guide and everything seems almost fine.
It gets here

Starting fpt server: proftpd.

and here it stays.

Any ideas?

I installed a former Debian Jessie and OMV 3, the box is finally running. Shall I try upgrade?