Learn Bash by Building a Boilerplate - Build a Boilerplate

I am starting the “Learn Bash” course and I am running the “ls -1” command in the terminal but am not getting passed.
I have cleared the terminal and opened new terminal multiple times. I also have restarted the project multiple times.

Challenge Information:

Learn Bash by Building a Boilerplate - Build a Boilerplate

looks like you typed -1 (one - the number) but the flag is -l (lowercase L letter)