CircleCI 2.1: Is it possible to trigger a job through API?

[kptdobe]

I created a simple example to illustrate the issue:

• v2.0 working API call: https://github.com/kptdobe/circleci_bug_report/blob/v2.0/.circleci/config.yml
• v2.1 broken API call: https://github.com/kptdobe/circleci_bug_report/blob/master/.circleci/config.yml

I also created a bug report.