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Ralf Stephan asked

account linking: server sends invalid_request / code_challenge_method+required

Hello, account linking proceeds until, after manual authentication, the Alexa app returns an error.

this is my config:


I could catch the oauth request exchange by using the Alexa app in Chrome. This is the request POST: 

and this the response: 

The server requires Authorization Code Flow with PKCE, and the only accepted code challenge method is S256.

Any ideas as to the reason of the fail?


alexa skills kitaccount linking
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