The redirect URI registered in Snowflake's OAuth integration does not match the connector's callback URL. The OAuth authorization code expired before the connector could exchange it for a token. The local HTTP server started by the connector for the callback was blocked by a firewall or antivirus. The authorization server returned an error in the callback (e.g., access_denied, server_error). CSRF state parameter mismatch — the state returned in the callback does not match what was sent

Verify the redirect_uri in Snowflake's OAuth security integration matches the connector's callback URL exactly.. Ensure the callback completes quickly — OAuth codes expire within seconds; network latency can cause expiry.. Check that the local port used by the connector for the callback is not blocked by a firewall or security tool.. Review the full error message in the callback URL's error parameter for the specific OAuth error code.. For non-interactive pipelines, use OAuth client_credentials flow instead of the authorization_code flow.

High severityauthenticationSnowflake →

Power BI Refresh Error:
251015

What does this error mean?

The OAuth authentication flow failed during the callback phase. After the user authorizes the application, the callback URL returned an error or the connector could not parse the response to complete authentication.

Common causes

1The redirect URI registered in Snowflake's OAuth integration does not match the connector's callback URL
2The OAuth authorization code expired before the connector could exchange it for a token
3The local HTTP server started by the connector for the callback was blocked by a firewall or antivirus
4The authorization server returned an error in the callback (e.g., access_denied, server_error)
5CSRF state parameter mismatch — the state returned in the callback does not match what was sent

How to fix it

1Verify the redirect_uri in Snowflake's OAuth security integration matches the connector's callback URL exactly.
2Ensure the callback completes quickly — OAuth codes expire within seconds; network latency can cause expiry.
3Check that the local port used by the connector for the callback is not blocked by a firewall or security tool.
4Review the full error message in the callback URL's error parameter for the specific OAuth error code.
5For non-interactive pipelines, use OAuth client_credentials flow instead of the authorization_code flow.

Frequently asked questions

Which OAuth flow should I use for automated pipelines?

Use client_credentials flow — it does not require user interaction or a browser redirect. Authorization_code flow is only for interactive user-facing applications.

How do I find the redirect URI the connector uses?

By default the Python connector uses http://localhost:<random_port>/oauth/callback. You can set it explicitly with the redirect_uri parameter in the OAuth integration configuration.

Official documentation: https://github.com/snowflakedb/snowflake-connector-python/blob/main/src/snowflake/connector/errorcode.py