Sls alexa auth returns 400 error

Hi all,
I tried to install the alexa serverless framework using the following link

I could successfully install the serverless and plugin. after the very next step if i try to run the sls alexa auth.
it redirects to aws login. then I am getting the following error

I have tried by downgrading servless version to 1.32.0 too still no luck . I have been blocked here for lot of days.

I have folder named alexa in that i have this serverless.yml and i found other in node_modules. I hope i modified the right one.

I have created a security profile and updated the urls with localhost and the port number in serverless.yml

Need some help very urgent.