Below are the common causes for the tray icon not showing.
ps -ef | grep 'insync start'
In KDE Plasma 5 the XEmbed protocol was replaced with SNI, which caused legacy tray icons to not be shown. In this case try installing xembed-sni-proxy. (Thanks to Roman Gaevoy for this tip.)
Ok it worked, I installed the package in linux and it worked, perfect application in linuxThanks, anything I leave feedback
Installing sni-qt still works like a charme in ubuntu 17.10
Nice, I finally got it working with GNOME, too, by installing sni-qt (the tray icon disappeared after GNOME decided to remove the legacy tray).
Thanks for the hint, guys!
Great! confirmed working in Gnome 3 and Ubuntu 17.10!