Starting unattended process

Hello, Currently I am beginner in UIPATH. When I am calling odata/Jobs/UiPath.Server.Configuration.OData.StartJobs, it is sending a response but at the same time it is showing pending in orchestrator along with the api response. Also the Type is Unattended everytime.

Can anyone please help me to solve this pending issue. Also the same process is running completely from UIPATH Assistant.

Thanks in advance.