sounds like the image you are looking for does not exists.
Resolution(s)
either Run the pipeline of project setup for that specific branch 7.15.0_1 it will create and push the image into the respective repository or use the latest branch ex if the latest branch is 7.16.0 for setup then use docker.sath.com/setup:7.16.0 (if you are using builder project then update the version in build-config.json file).