v3.50~13: GUIv2 over VRM comes empty

I am running beta (large version with SignalK) for some months without problems and also GUIv2 as default UI for at least 2 months now.

Today, my system is still up to date in VRM, but I cannot start GUI v2 from VRM - it comes up empty. This was working in the morning, but does not work now:

All pages are “empty”.

Data in VRM seems to be up-to-date:

However, Firmware update via VRM fails:

Is there a way to reboot Cerbo remotely (I do not have ssh access enabled on firewall)?

Are you using beta VRM?
There is no way to remotely restart the GX, the automatic restart option needs to be set on the GX.

I use https://vrm.victronenergy.com/ which is not beta, right?

nope, so GUI V2 will not work there.

But it was working there until this evening. I was able to access GUI v2 this morning from VRM.

But I think it is not GUI related issue, as now it does not update VRM - same data for 40 minutes:

gui V2 was only accessible via prod as an error that was corrected.
Non - realtime connectivity is a different issue.

@nickdb It is working here on vrm.victronenergy.com

I do not understand this: I have this GUIv2 menu option in VRM for quite some time:

I also have it in PROD and it is functional.

My system got back online and now GUI v2 is accessible again.

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I see this usually after updated Venus firmware when I try to open gui-v2 too soon.
Usually Ctrl-R in VRM and re-check of gui-v2 help me to clear the cache and get it working again