CORS headers issue

[Firsak]

Hello!

I was working through the project and everything worked just fine, but at the step of adding dev rest api authentication CORS header broke.
Access to XMLHttpRequest at 'http://localhost:8000/api/tweets/' from origin 'http://127.0.0.1:3000' has been blocked by CORS policy: Request header field http_x_requested_with is not allowed by Access-Control-Allow-Headers in preflight response.
It doesn't work both with the localhost and 127.0.0.1
I even dowloaded the full application of this step and it didn't work either.

[Firsak]

Hmmmmm, it's really strange, but I don't receive it in a new window...

[rd9911]

Did you do all configurations in settings.py?

[Firsak]

Did you do all configurations in settings.py?

Yes, I do. Because it was working till I added the dev authentication.
And to be sure, I downloaded the version of the project from tweetme2 master branch.

As I understood it's some bug with the browsers, because I was suddenly receiving this error twice in the projects, that were already working.

[SnowLLL]

Did you try http://localhost:8000/?