What part of the instructions you got from diagnostics told you to remove the use strict; line? strict prevents you from misspelling variable names, something you do in your code.

Removing strict tells Perl not to tell you about the errors you made in your script. If you add it again, Perl will tell you again about the errors you made. I won't write your code for you, so you'll have to look a bit closer at your program.

As a hint, the two variables %myHash and $myHash are different things in Perl.

Now that I have commented the "use strict" statement

Turning off error checking does tends to not fix anything.

You have to keep fixing the errors that pop up, rather than removing use strict. If you are overwhelmed by the number of errors, rewrite the code from scratch with use strict from the beginning, so you get to fix the errors one by one.