I uninstalled and installed xdg-utils several time .
sudo apt-get purge xdg-utils
sudo apt-get install xdg-utils
sudo apt-get update
sudo apt-get upgrade
At one point Dillo web browser appeared as i lost chromium browser
Reinstalled Chromium browser .
Restarted skyspy and now it is working
Probably did other updates too but can not remember which ones
Thank you for a brilliant piece of software
UPDATE
I uninstalled and installed xdg-utils several time . sudo apt-get purge xdg-utils sudo apt-get install xdg-utils sudo apt-get update sudo apt-get upgrade At one point Dillo web browser appeared as i lost chromium browser Reinstalled Chromium browser . Restarted skyspy and now it is working Probably did other updates too but can not remember which ones Thank you for a brilliant piece of software