Tray Icon doesn't work in ubuntu 18.04

[dhiren-hamal]

Nylas Mail client does not appear in nither in notification box nor in tray icon menu bar in ubuntu 18.04.
It would be great if you put the mail notification in the notification box. Ubuntu 18.04 notification service is just awesome so, please update the Nylas Mail for ubuntu 18.04.
I have attached the screenshots of Spotify maybe it can be helpful for you.
Thank you very much.