It seems likely that this bucket was created in a different region. Please send your request to your region endpoint. The default region is as follow's
US Standard is us-east-1
The upper link have region **'Region.US_WEST_2'**. First confirm your region then send your request accordingly.

It seems likely that this bucket was created in a different region, IE not us-west-2. That's the only time I've seen "The bucket you are attempting to access must be addressed using the specified endpoint. Please send all future requests to this endpoint."
> US Standard is `us-east-1`