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Occasional INVALID_REFRESH_TOKEN errors from Fantasy API?

'Hoo Recruit

Occasional INVALID_REFRESH_TOKEN errors from Fantasy API?

Every once in a while, an Oauth2 token that I have from the Yahoo Fantasy API stops allowing me to refresh it.  I will pass the refresh_token to the get_token end-point and the response will be:

 

{"error":"INVALID_REFRESH_TOKEN","error_description":"Failed to decode/encode refresh token"}

 

This is a token that I was previously able to refresh many times just fine.  And then suddenly it stops working.

 

(I think my previous post was deleted because I provided an example token, so I won't do that again, but I'd be happy to provide additional information if necessary.)

 

Thanks in advance!