After installing version 11 of the extension from the GNOME extensions site, I can see the extension in the "Extensions" app. After clicking on its "settings", a new window entitled "Go to Last Workspace" appears, containing a table with columns "Keybinding" and "Accel" with only one row which contains respective values "Go to last workspace" and Disabled". The settings window is unresponsive to any clicks, right-clicks, tab, enter, or space, cannot even be dragged, and cannot be closed using the 'x' icon in its title bar. I am able to at least close it using alt+F4. The default keybinding of super+escape does nothing, even after reloading GNOME and toggling between some workspaces. So it apparently doesn't work at all, and no information which could be useful for troubleshooting is provided.
I'm running GNOME 42.9 on Ubuntu 22.04.4 LTS.
After installing version 11 of the extension from the GNOME extensions site, I can see the extension in the "Extensions" app. After clicking on its "settings", a new window entitled "Go to Last Workspace" appears, containing a table with columns "Keybinding" and "Accel" with only one row which contains respective values "Go to last workspace" and Disabled". The settings window is unresponsive to any clicks, right-clicks, tab, enter, or space, cannot even be dragged, and cannot be closed using the 'x' icon in its title bar. I am able to at least close it using alt+F4. The default keybinding of super+escape does nothing, even after reloading GNOME and toggling between some workspaces. So it apparently doesn't work at all, and no information which could be useful for troubleshooting is provided.