I hope you understand that it is hard for us to support you as we cannot refer to the details.
- give a retry on the Http Request
- maybe this will Help Json Http Request - RPA Component | UiPath Marketplace
- maybe you will get more controll via api: .Net HttpRequest:
- and for a last resort Python integration and Powershell Call can be checked.
However still retry and try to be close as much possible to the UiPath essentials