Operating System/Distribution

Which distribution of Linux are you using?
Linux Mint 20.2 base: Ubuntu 20.04 Xfce 4.16.0

Installer

Which version of the app?
2.9.0
Which installer type?
GitHubDesktop-linux-2.9.0-linux3.deb

What happened?

After installation the icon does not appear in the bottom bar.

Provide as much detail as possible. Error messages or output are extremely useful.