I've installed my distro yesterday and then spotify-client. But no icon appeared, this can be a workaround if you have a similar issue.
1. Your device and operating system: Desktop PC (AMD FX-6300) - OS: Debian 9.5 (4.9.0-7-amd64) 2. Type of Spotify account you have (Free/ Premium): Premium 3. The app version of Spotify you’re using: spotify-client 1:18.104.22.1680.g51b03ac3-13 4. Brief description of the issue: Spotify's icon not appearing. 5. Steps to reproduce the issue: a) Just install the distro b) Then install Nvidia controllers (version 390.87) and cinnamon desktop (version 3.2.7-4). c) The icon is missing but you can start spotify using your terminal
FIX: Once i created a symbolic link, the icon appeared. No need to restart cinnamon btw.