I run PopOS and previously ran Ubuntu which wasn’t getting an error.
If you have an issue using the telemetry or accessing the pixhawk via usb, and or upir error involves /dev/ttyUSB0 or /dev/ttyACM0 then this might help.
$ ls -l /dev/ttyUSB0
crw-rw---- 1 root dialout 188, 0 Jan 29 08:16 /dev/ttyUSB0
This shows you the permissions of what group can access that device. In this case,ttyUSB0 allows the group dialout.
yourusername adm dialout sudo lpadmin
This shows you all groups.
$ sudo adduser yourusername dialout
This adds yourusername to the dialout group that ttyUSB0 gives access to.
I had to then reboot.
I also think this probably explains why my new virtualbox with win10 guest wasn’t working with telemetry.