15 Days Tester challenge - Day 1: Request body updated | TypeError: Cannot read properties of undefined (reading 'request')

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My question:
I am getting this error, only 4th test case failing while submitting the collection, not able to fix this error, need help from the Community

Details (like screenshots):

How I found the problem:
while submitting the collection for day 1

I’ve already tried:

Does the saved request need to be named echo? I’m not sure what the instructions say, just going off the script.

Looks like you’re request name in the full URL

Thanks @dannydainton , able to fix this error, I just need to rename the request name as echo, thanks for the quick help