HPLIP tray bug

Dear friends, I am running Debian 10 on a new laptop, and have installed hplip to handle a printer. At the staring of the system, every time, I got this message: "no system tray detected on this system". I've tried disabling every start-up messages or error messages in hplip gui. No deal. I have followed this (installing a couple of dependencies) [Debian bug track](https://bugs.debian.org/cgi-bin/bugr...cgi?bug=793675) and no deal, either.
Any ideas?
Cheers!

PS: see the message: https://pluspora.com/uploads/images/...6e4f49d41b.png