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Thank you for posting your question. The error Token could not be decoded or is missing in DB is related to the Unsuccessful Refresh Token exchange, reused refresh token detected. If your app is reusing a token, Auth0 detects this and invalidates the whole refresh token family, so you can no longer use that token. Any subsequent use of that same token will result in the Token could not be decoded or is missing in DB error message. I would guide you to check the logic behind refresh token usage as, based on the logs, that’s where the issue could be.
Thanks
Dawid