You are correct, the first issue started happening because of username change on AIcrowd website. Unfortunately, the sync in AIcrowd username with Gitlab isn’t perfect right now and your username remain to older username, causing weird issue earlier. After the fix you did by deleting your account, things are working as expected.
Your newer submission failed because you are using library version 2.1.4 while the server is expecting 2.1.6. Please feel free to update your version.
We do post logs frequently to all failed submissions, but there can be delays. Hence, let me introduce
debug=True flag which will be helpful to you in cases like this. You will be able to view all of your logs without @aicrowd-bot involvement and remain unblocked. https://github.com/AIcrowd/flatland-challenge-starter-kit#repository-structure
Wish you luck with the competition.