Disable gnome extenstions from command line, to workaround a login loop

Some gnome extenstions can cause ubuntu to go into a login loop, causing it to keep showing the login screen every time you login. The only workaround is to disable the extension which is causing the login loop from a command line login. From the GUI screen type

cntrl + alt + F2(or any other function key which shows a text based login)

Login by providing the correct credentials.

To see all a list of all the extentions, run the command $ls ~/.local/share/gnome-shell/extentions/

To disable the extensions, run the command. $ gnome-shell-extension-tool -d "name of the extensions"

Try logging in after disabling one extenstion at a time, and you should be able to figure out the one causing the login issue. Keep that disabled untill you can find an upgrade which resolves the issue.