Fork with async await in nodejs not working

I have tried to forking in node. For simple calculation it seems to work fine. But when I use for loop, I don't get any result. I have tried using promise also but all I get is promise pending. Below are the code used.

In moduleProgress.js:

const getModules = async (studentArray) => {
  let progress = [];
  for (const student of studentArray) {
    console.log(student); //prints the first student id an then nothing happens
    let std = await User.findById(student); //stops here
    console.log(std); //nothing
    std = {
      username: std.username,
      firstname: std.firstname,
      lastname: std.lastname,
      batch: std.batch,
    };
    progress.push(std);
  }
  return progress;
};

process.on("message", async (params) => {
  const progress = await getModules(params.students);
  process.send(progress);
});

In another file:

if (students.length > 0) {
        const calculation = fork("helpers/moduleProgress.js");
        calculation.send({
          students: students,
        });
        calculation.on("message", (response) => {
          allStatus = response;
          console.log(response)
        });
        res.json({
          success: true,
          allProgress: allStatus,
        });

Solved it. Called the instance of mongoose in the moduleProgress.js (child) and it worked as a charm.