Create project API with "template_project_id" property is not working

Summary

For create new project using "template_project_id", I am getting the below error: As per docs I tried using "use_custom_template": true https://docs.gitlab.com/ee/api/projects.html#create-project But getting the error as below: , I am trying to use the ID of this template: https://gitlab.com/gitlab-org/project-templates/jsonnet. Unable to figure out how to use the property "template_project_id", to create a project. The same works when using "template_name"

Steps to reproduce

POST http://gitlOnPremSetUp.com/api/v4/projects with the payload

{

     "name": "test_name1",
    "template_project_id": 19985677

}

What is the current bug behavior?

API returns an error response.

What is the expected correct behavior?

The project should get created with the template_project_id passed in the payload.

Output of checks

This bug happens on On prem set up of gitlab