Problems authenticating an app to use Twitter by OAuth ("Page not found")

[GarciaCarmonaAM]

Hello, I’m trying to authorizate an app to use Twitter by jsOauth (OAuth by JS), but the window which should be displaying the authentication section displays “Page not found, …” being the consumer keys correct and enabled “READ/WRITE” permissions.
The code is correct and I had the same problem using a link with the URL (that contains the keys) to do that directly and without code writing.

How can I fix that?

[GarciaCarmonaAM]

I had this problem because I was using it in a browser and I can’t use OAUTH directly by JS on a web browser, if not for extensions or another use that not be on a web page directly instead of another languages.