The client was authorized, but Ecobee returned an invalid_client error

[jimboca]

This is strange, why Unathorized 401 return?

2020-09-11 08:51:01,425 Controller polyinterface      ERROR    pgSession:l_error: Ecobee Controller:reponse:post: Unauthorized: https://api.ecobee.com/token?grant_type=refresh_token&client_id=xxx&refresh_token=yyy: text: {
  "error": "invalid_client",
  "error_description": "Authentication error, invalid authentication method, lack of credentials, etc.",
  "error_uri": "https://tools.ietf.org/html/rfc6749#section-5.2"
}

Restarting the nodeserver fixed the issue...

[jimboca]

This issue is caused by a connection lost when Ecobee returns the new access code, have discussed in depth with Ecobee support, Should be fixed with new authorization method in 2.2.0