Nope. No file dialog will appear. For me it’s just a “dead” button
That is another common problem with the debian package. It can probably be fixed with:
sudo apt install zenity
Since local files are optional, the package only recommends zenity, it does not depend on it. zenity is just a file picker used to select the directory where your local files lives. Then you also need the correct (old) version of libavcodec installed. It is probably easier to use the snap version.
I am using ubuntu 17.10 and running gnome Wayland and have installed Spotify as a snap package but it doesn't allow me to add local files.The dummy Add a source button doesn't do anything. I have already installed zenity, ubuntu restricted extras and all other files but I don't get any popup to add new files and when I select a .mp3 file to open with Spotify, it never plays.
Please have a look into this and any help will be appreciated.