How to fix Sage Intacct OAuth error: Token is not valid
Blog post from Nango
In June 2026, issues with a customer's Sage Intacct API integration arose when connections repeatedly lost access due to token invalidation, specifically returning the error code REST-2102. This problem surfaced whenever a new connection was authorized for the same Sage Intacct user and company, causing the previous connection's token to become unusable. Although this behavior is not documented by Sage, the pattern suggests that only the most recent authorization holds a valid refresh token, invalidating earlier ones without warning. To resolve these issues, it is recommended to re-authorize the failed connection and limit each user-company pair to one authorization-code connection. If multiple connections are necessary, using separate Sage Intacct users or client credentials for server-to-server access is advised. Additionally, developers should ensure the inclusion of the offline_access scope for refresh tokens and be cautious of any revoke requests that might affect shared token pools. The inconsistencies in Sage Intacct’s error responses complicate troubleshooting, but adhering to these practices can help manage token refresh failures effectively.
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