Hello pasiasach!
This error happens when there was an error in the ingestion program. Indeed the ingestion program encountered an error and thus no resulting meta-learner is saved for the scoring program.
From the submission I am looking at right now 45310 (Meta-dataset 1), it seems that you try to import the module dataclasses that is new in python 3.7. Note that the docker image is based on the official tensorflow-gpu 2.3.0 docker image and this image does have the 3.6.9 version of python.
The docker environment we provided in the starting kit is working exactly like the codalab environment. We will update the python version in the conda setup provided in the starting kit so that participants that do local experiments using the conda env have the same python version (currently 3..7.0).
To summarize, one cannot use the dataclasses package in your submission since the python version supported is 3.6.9.
Best,
Adrian