As per error looks like you have sent too many requests from UiPath to the connector and quivkbook is blocking the api now…so check eith your quick book teams to unblock..also if your requests are high then api rate limits might need a change to avoid further issues
429 refers to too many requests from UiPath to quickbooks
quick book say this problem from UiPath side this from quick team (you will need to contact the UiPath technical support team directly for assistance with handling API rate limits or adjusting the request pacing in your robot workflow )
Could you please check whether your QuickBooks connection is still active? QuickBooks enforces a limit of 500 requests per minute per company, with a strict 10 concurrent request limit. Batch operations are limited to 40 requests per minute.
You can add a small delay between API calls or reduce the batch size for batch operations to avoid throttling issues.
or looks like you are using oauth instead might need to shift to bring your own app…as that might be hitting throttle limits which is around 10 request per ID…so if you use Oauth method the limits would be combined for all connections