docker.errors.BuildError: pull access denied for personalhealthtrain/train-parent-python, repository does not exist or may require 'docker login'

[rezacsedu]

Hi Lukas,

I managed to ship a tar file to the tar to train service. However, it shows docker.errors.BuildError: pull access denied for personalhealthtrain/train-parent-python, repository does not exist or may require 'docker login'. Details logs are attached below. Please suggest.

Logs

137.226.58.210 - - [04/Feb/2019 21:58:18] "POST / HTTP/1.1" 200 -
Execution of job "Adds Dockerfile to the tar archive (trigger: interval[0:00:01], next run at: 2019-02-04 21:58:20 UTC)" skipped: maximum number of running instances reached (1)
Job "Adds Dockerfile to the tar archive (trigger: interval[0:00:01], next run at: 2019-02-04 21:58:21 UTC)" raised an exception
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/apscheduler/executors/base.py", line 125, in run_job
retval = job.func(*job.args, **job.kwargs)
File "app.py", line 238, in background_job
process_jobs(jobs)
File "app.py", line 204, in process_jobs
func(job)
File "app.py", line 231, in func2
tag=repository)
File "/usr/local/lib/python3.7/site-packages/docker/models/images.py", line 287, in build
raise BuildError(chunk['error'], result_stream)
docker.errors.BuildError: pull access denied for personalhealthtrain/train-parent-python, repository does not exist or may require 'docker login'
Traceback (most recent call last):

How did I reproduce this issue?

Step 1: download this file and unzip it to get the tar file (GitHub doesn't support tar so had to make it zip) updatedpht.zip
Step 2: curl -F '[email protected]' http://menzel.informatik.rwth-aachen.de:3007