Thank you so much for your work.
I have a DS418Play which is no suitable for VMM but i used the DS218+ VMM package and it is compatible. The only thing i had to do was to add this line ( support_ovs = “yes” ) to the file ( /etc/synoinfo.conf ) because of the activation of Open vSwitch.
Followed every step mentioned and imported your .ova file and voilá.
Restore complete snapshot and boommm. Perfect, with everything working.
Also have made an upgrade to synology ds418play memory to 8GB
Thanks for the work and cheers ( hope it´s cold enough 
)