That's the goal!
I don't know.
You can always backup if you have access.
Better safe than sorry.
Take your time. I agree with LeoRX that MariaDB might be a priority (NextCloud will, kind of, fall apart without it on most configurations).
Take your time and backup everything you can.
MrGrey.
I backup my UnRAID server. I trust nothing.
Just me, but get a router of your own. Some like pfSense, or Opensense, or Unifi, or etc...
Everyone else has offered very good advise.
MrGrey.
Why?...
Why?...
OK... I'll bight, and you're using pfSense for what?
That's what I do... Oh shit, I've given myself up, haven't I?
Are you sure you want to?
MrGrey.
A restart will probably fix things (not that restarting is a good thing/solution).
Your Unraid is running on?
You're accessing it on?
I'm not, but I'm not you.
It can be very difficult to test things "inside" and "outside" your "house." Do you have a VPN to test things?
MrGrey.
I don't use VMs in UnRaid.
Can you log into your router? Do you know what your router is?
I don't want to be condescending. Just trying to help.
MrGrey.
I can't be certain and I'm really not very smart, but (like people trying to run pfSense 🙄) have you tried to run things that conflict with one another?
Be honest.
Time to stop cut/paste and build something that works.
You are smarter than most.
I would recommend loosing all VM and see if pure Unsaid (<- that's UnRaid spelled properly?) will work. [Doesn't anyone have control over spelling in this place?]
MrGrey.
In my experience (less than yours), any shutdown of UnRaid not specifically done from the UI (don't know about CLI <-- see previous six words) will start a parity check.
I'm very lucky to have a UPS (does nothing if software sucks). I'm lucky to have good hardware that I trust.
Renovations (common)... I stop the parity check and wait (every month -- pain in the ass) for the next one.
I don't suppose I'm helping unless you trust your hardware. I don't trust UnRaid (that's why I backup), BUT!... It's never failed me.
Double back and look at those last four words.
MrGrey.