[SOLVED] Improper invoking of Functions from Flutter

Hey all, I have been trying to make a function invocation from dart code but the execution always keeps failing but if I i with similar initial data test the function out from console it works, please do let me know where do I go wrong

I have uploaded the screenshots of my dart code where I am trying to invoke the function along with my Nodejs function code and the error I am getting please do let me know where I am wrong

TL;DR

The user was having trouble invoking a function from Flutter. They were advised to convert the function output into a JSON format and then into a string before sending it. They were also reminded to use jsonencode and ensure that they are sending a JSON instead of a string. The user uploaded screenshots of their code and asked for assistance in identifying where they went wrong. The problem was solved by converting the function output into JSON and then into a string.

this is console initial input on which it executes successfully