Though your import is getting failed, it will create a folder in your downloaded location with the same name of Alteryx package which is something similar to this " challenge_182_start_file" folder. Locate and Open the folder where you will find required supporting files (Alteryx workflow, Alteryx output, Alteryx input file ) . Now drag and drop the workflow into canvas and it will give you some warning message as attached, click Yes and proceed further. It should work. Let me know if it does not work.
Hope Alteryx will not screw this short cut method in upcoming versions.
Looks like the solution included underscores in its analysis, I opted to take out all special characters and numbers to do a word analysis.
I got close to the provided solution like others, but didn't want to take the time to dive deeper into what differences there might have been.
I did the download & .txt solutions to see what might be different.