The only detail that this exercise was missing was any sort of hint for the last step about what is the "error message" and how to get it. The exception protocol only comes after this exercise, that's why I decided to add this information only as a casual mention in the instructions.
neenjaw
commented
3 years ago 
The only detail that this exercise was missing was any sort of hint for the last step about what is the "error message" and how to get it. The exception protocol only comes after this exercise, that's why I decided to add this information only as a casual mention in the instructions.