I see 2 types of errors:
1. 504 Gateway Time-out on "HTTP Request Bearer Token" which most probably indicates that your website gets overloaded
2. {"type":"
https://httpstatuses.com/409","title":"Conflict","status":409,"detail":"SurveyObject 'Q111' already exists.","instance":"/api/v1/surveyobject"} which indicates that you're trying to create the object with the same name -
Q111 and your system doesn't allow duplicate names
Both are not related to BlazeMeter by any means.
- To resolve #1 you need to either raise an issue with the development team or put your "HTTP Request Bearer Token" under the Once Only Controller.so you get the token only once per user
- To resolve #2 most probably you need to use an unique name instead of this "Q111", maybe some JMeter function like __RandomString() or __UUID()
And change your password ASAP as now it's compromised and known to everyone.