installing MinimServer on Synology DS218+ NAS

[Peter@57m]

Hi - welcome to the forum

I don't have a Synology NAS but I took a look at the install instructions.

The Synology DS218+ is an Intel based NAS.

From the install instructions:
If your Synology NAS has an Intel processor, and Java isn't installed, install Java by following the instructions in this section.

So can you confirm you have Java installed and which version of MinimServer did you download. It will help to resolve your issue.