Amazon cognito js 404

[jorgejova]

Im having a error trying to login or register in amazon cognito. The functions was working one month before and now through an 404 error, with this url: https://cognito-idp.us-east-2.amazonaws.com/
and this description code: {"code":"BadRequest","message":"The server did not understand the operation that was requested.","type":"client"}

Note: The working implementation of a month before has not being changed. It just stop working.

Could be something about the version of aws-sdk?

Thanks a lot for the help.

Best regards, Jorge