Thank you for reaching out to the Google Ads API support team.
Could you please confirm whether you are trying to upload conversion by using the
Google Ads API or the UI?
Google Ads UI: If you're interacting with Google Ads through a web browser interface with menus, buttons, and visual representations of your campaigns and data, you're using the UI.
Google Ads API: If you're working with code libraries or scripts to interact with Google Ads programmatically, you're using the API. This involves writing code that sends requests and receives responses from Google Ads, bypassing the visual interface.