md4c docker image not found

[FreddyYJ]

When I tried to checkout md4c-1, it produced API Error.
This is the command I executed: python3 bugscpp/bugscpp.py checkout md4c 1 -b

Output:

[md4c] cloning a new repository from 'https://github.com/mity/md4c.git'
[md4c] checking out 'e6e2ea4c5a5b972779d9222c4f66b5a693444ce2'
    Image: hschoe/defects4cpp-ubuntu:md4c
    An API Error occured.
    Find detailed message at /tmp/defects4cpp.log.
[md4c] done
Elapsed: 15.20s

At /tmp/defects4cpp.log:

INFO[processor.checkout]: git-clone 'md4c'
INFO[processor.checkout]: git-checkout
INFO[processor.checkout]: git-am skipped
INFO[processor.checkout]: copying extra directory(f/home/youngjae/backup/bugscpp/bugscpp/taxonomy/md4c/extra/0001) to project root
INFO[processor.checkout]: creating '.defects4cpp.json' at /home/youngjae/backup/bugscpp/md4c/buggy-1
ERROR[processor.core.docker]: APIError 404 Client Error for http+docker://localhost/v1.43/images/create?tag=md4c&fromImage=hschoe%2Fdefects4cpp-ubunt>
INFO[processor.checkout]:     image: '<Image: 'hschoe/defects4cpp-ubuntu:18.04', 'hschoe/defects4cpp-ubuntu:libxml2', 'hschoe/defects4cpp-ubuntu:md4c>
INFO[processor.checkout]: pulling docker image