Still won't install on Ubuntu Gnome 16.04

[monotasker]

It worked before the latest update. I ran the package installation recommended in the revised description (the package was already installed) but I still have the extension set to "Off" automatically when I try to install.

[danielkza]

The last release only added the GNOME 3.20 compatibility, so it shouldn't have changed anything. Can you run the command I posted here and tell me the results?

[aperomsik]

I am having the same problem-- extension was working fine but I was prompted to update and update failed. The command output:

aaron@ernie:~$ dbus-send --session --print-reply --type=method_call --dest=org.gnome.Shell /org/gnome/Shell org.gnome.Shell.Extensions.InstallRemoteExtension string:[email protected]
Error org.gnome.Shell.LoadExtensionError: Error: Type name WindowButtonsPrefsWidget is already registered

[aperomsik]

Seems for me it was a conflict in folder names. I removed the folder named "Gnome-Shell-Window-Buttons-Extension-11_e.g.o" (dated 2013) and then the shell was willing to install as "[email protected]".