Missing icon in systray

[hifi25nl]

I have installed minimserver 0.8.3 update 57,in /opt and I had to give 777 permissions to /opt/minimserver/data folder (no other way to make it work, I would have preferred a directory in /home/user/.config for data)

The only way I can connect to minimserver for configuration is http://localhost:9790/ (and this after a lot of tentatives!).

I have not an icon in systray both in Plasma 5 (with libappindicator installed) and lxqt desktop. I have tried trayer but also there no icon, so no real setup.

Note:
I see that minimserver is trying to update itself, but this it is not possible if installed in a root directory. How can I disable this?