I got the Echo Dot (with clock). In fact, I tried to change the wake word, not by a command, but with the Alexa mobile application. In settings, there is an option "Wake Word" and it shows "loading". Of course, when I go to that page, the page is empty. After a couple of minutes, there is a pop-up saying that it is unable to fetch the wake word, try again later... I tried many times (days) and this option does not work.
I was wondering if it is because I have the application for Alexa Canada or something else. Thank you.