For the past few months, we were getting reports of command-line answer checking issues on our platform, especially for the missions in step 3. It was primarily due to a platform issue that was hard to reproduce. A couple of weeks ago, our engineering team pinpointed the problem and implemented a fix! It appears that all of the command-line answer checking issues related to the platform issue have been resolved.
However, if you are experiencing any problems in the command line missions, please let us know by clicking the Contact Us link on the top right corner of the community.
Until then, Yay!