When you enable this setting: “How many minutes does the user have to finish the quiz? (Leave 0 for no time limit)” by entering the time in minutes. It will display the timer on the bottom right side of the screen (screenshot attached).
Did you enable the setting by entering the time in minutes? If yes, please give me your website’s admin credentials so that I can take a look.
Make sure to set the message as private before sending the credentials.
I just enabled “How many minutes does the user have to finish the quiz? (Leave 0 for no time limit)” on the first quiz by entering 5 in the field for the first quiz. And now it is showing the timer on the screen(screencast attached).