Same Problem i am facing , if anyone have answer to it please let me know 

import { NextRequest, NextResponse } from "next/server";
import Replicate from "replicate";


export async function POST(req: NextRequest) {
  const data = await req.json();
  const replicate = new Replicate({
    auth: process.env.NEXT_PUBLIC_REPLICATE_API_TOKEN || "",
  });
  const { prompt } = data;
  const input = {
    prompt: prompt,
    output_format: "png",
    num_outputs: 1,
    aspect_ratio: "1:1",
    output_quality: 80,
  };
  const output = await replicate.run("black-forest-labs/flux-schnell", {
    input: input, 
  });

  console.log(output);
  return NextResponse.json({ imageUrl: output }); 
};

---i am getting empty imageUrl