Error getting pool data – JSON Parse error: Unrecognized Token '<'

[Name already in use]

Hi guys,

I have not much information. The only thing I know is that last time I checked the system everything was working (except the trouble with 11.3 downgrading to 11.2 which was fixed since then). And what I mean with "not much information" is, that everybody using this system told me that nobody did anything. But the UI language was set to a local one and the was weird – I always keep it on English.

Version was 11.3-U3.1 and I updated it to U4.1 yesterday hoping this will fix this issue, but it did not.

What I did already:

1. First order of business was to restart the UI
2. Reboot of the system
3. removed all "new" datasets via terminal

The Pool is in use, everything is working, all shares, everything. You can just not open the Pool view and therefore cannot create new datasets or modify the ACLs using the GUI.

I searched the forums but I only found one post and restarting the UI did help, which it does not here.


Any hints? Thanks.

Pascal