Extension fails to load in Debian Stretch

[Sufian]

The error message in the Tweak Tool says "There was an error loading the preferences dialog for Extensions Sync" with following details:

SyntaxError: class is a reserved identifier

Stack trace:
  Application<._getExtensionPrefsModule@resource:///org/gnome/shell/extensionPrefs/main.js:74
  wrapper@resource:///org/gnome/gjs/modules/lang.js:178
  Application<._selectExtension@resource:///org/gnome/shell/extensionPrefs/main.js:89
  wrapper@resource:///org/gnome/gjs/modules/lang.js:178
  Application<._onCommandLine@resource:///org/gnome/shell/extensionPrefs/main.js:239
  wrapper@resource:///org/gnome/gjs/modules/lang.js:178
  main@resource:///org/gnome/shell/extensionPrefs/main.js:377
  @<main>:1

OS: Debian Stretch
Gnome version: 3.22.2

[Osman Alperen Elhan]

I didn't test this extension for the gnome-shell versions under 3.32. There was a breaking change in gnome-shell so I don't think it will work.