Yes, it seems you have the node version. It is a bit dated, so you can use this to update : How to properly update mineos-node
That probably not be the solution to your error, that is just a sidepoint. It do however clear out a host of other bugs 
@hexparrot (creator of MineOS) may have to correct me if I am wrong, but I think that the greyed out “60” in the “save-all” setting is to be considered an example and a suggestion. For it to actually be set, you must write a number there. I suggest something around 60 for it to match your backup timer.
In your minecraft server directory there is a configuration file that contains all information MineOS uses to control your minecraft server:
/var/games/minecraft/servers/(servername)/server.config
In this file you will find a few settings that may not be instantly obvious or available in the WebUI
Please check this file to see if the following settings are there, and what they are set to:
[onreboot]
restore=false
start=true
It is not certain that the setting “restore=” is there, but if it is make sure it is set to “false”.
You should also see a “commit_interval”, this is the “save-all” setting.
Another thing to check (one of the “I’m not stupid you know” things;D) is if the disks on your MineOS server is full or not. Minecraft will happily continue to let you play and create even though the disks are full, but it will discard all new changes from memory when you stop the server, if it can’t write them to disk (I lost about a month of minecraft that way. My players where not happy…)