In /usr/bin/start-pulseaudio-x11 line 26:
        plasmaversion=`grep "X-KDE-PluginInfo-Version" $DESKTOP_SESSION.desktop | cut -d "=" -f2 | cut -d "." -f1,2 | tr -d "."`
                      ^-- SC2006: Use $(...) notation instead of legacy backticked `...`.
                                                       ^--------------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
        plasmaversion=$(grep "X-KDE-PluginInfo-Version" "$DESKTOP_SESSION".desktop | cut -d "=" -f2 | cut -d "." -f1,2 | tr -d ".")

For more information:
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...
  https://www.shellcheck.net/wiki/SC2006 -- Use $(...) notation instead of le...