Subflow test issue

I am facing huge problems since this issue started with subflows. I tested and clicked ‘Wait for Response,’ and consistently I only received {}. I checked all parameters and also tried testing the subflow directly; it worked fine there, but when I tried testing it inside the main flow again, I got {} as the answer.

It is the first time I have faced this problem; the workflow for using subflows has always been flawless, so I don’t understand where the issue is or how to fix it. Can anyone please check it out? @kishanprmr @abuaboud