Download your preferred distribution of Keycloak https://www.keycloak.org/
Create a realm myrealm and a client myclient. Also create a user.
For simplicity, the realm name and client name are hardcoded in src/boot/keycloak.js
Client Root URL should be http://localhost:4200
Switch to createWebHashHistory in src/router/index.js to see the 404 error after login redirection. Please note this is not related to Quasar (quasarframework/quasar#10062) and also fails without Quasar (https://github.com/gnieser/vue-keycloak)
More information: