dbfin/gnome-shell-extension-yawl — pull request #55 by MichaelTunnell (2014-12-07 16:03:33+00:00)
Title: Updated to v18 for 3.12 and 3.14

I don't know where you put the variable for the version that is listed in the metadata.json file so it is still listing v17. If you want to use my suggestion of update to v18 then that variable will need to be changed as well.