[Vuejs]-Laravel Websanova/Vue-Auth Login/Register Returning Undefined URL

I’ve faced a similar problem with the undefined part in URL.

The reason was that I did not have the MIX_APP_URL variable set up in my .env Laravel configuration file.
The way ${process.env.MIX_APP_URL} works is that an environment variable can be injected by Node at runtime, in this case the application url.

One reason we want the MIX_APP_URL in .env is that any developer using your application can easily set it up and only modify the MIX_APP_URL variable.

The other, very important reason is that the URL will differ for a local server and for production – in this case the solution to change it to a static URL would not work and would be prone to an error in a production environment.

One thing to notice though, when running the NPM watch task, the change of an .env variable does not apply immediately, the watch task has to be restarted.