invokeModel from '@aws-appsync/utils/ai' result in 'Value for field '$[method]' not found.'

[niqo01]

I am trying out appsync bedrock integration using '@aws-appsync/utils/ai' But I am experiencing the following issue: Value for field '$[method]' not found.

Please find below all the details:

Version: "@aws-appsync/utils": "2.0.3"

Appsync javascript function code:

import { runtime, util } from "@aws-appsync/utils";
import { invokeModel } from "@aws-appsync/utils/ai";

export function request(ctx) {
  const { nameToUse, cached } = ctx.stash;

  if (cached) {
    runtime.earlyReturn(ctx, { skipTo: "NEXT" });
  }

  const prompt = `
    REDACTED
  `.trim();

  return invokeModel({
    modelId: ctx.env.BEDROCK_MODEL_ID,
    body: { inputText: prompt },
  });
}

export function response(ctx) {
  if (ctx.error) {
    util.error(ctx.error.message, ctx.error.type, ctx.result);
  }
  if (!ctx.result) {
    util.error("Resolve service error", "InternalServerError");
  }

  const out = JSON.parse(ctx.result.results[0].outputText);

  ctx.stash.transliterated = out.unicode.trim();

  return ctx.result;
}

Appsync logs:

{
    "logType": "RequestFunctionEvaluation",
    "fieldName": "assignName",
    "resolverArn": "arn:aws:appsync:us-east-1:{redacted}:apis/{redacted}/types/Mutation/resolvers/assignName",
    "functionName": "ResolveNameFunction",
    "fieldInError": true,
    "evaluationResult": {
        "operation": "InvokeModel",
        "modelId": "amazon.nova-micro-v1:0",
        "body": "{\"inputText\":\"REDACTED\"}"
    },
    "parentType": "Mutation",
    "path": [
        "assignName"
    ],
    "requestId": "a0f5b7ed-8b64-4b59-b95e-f5488b53b624",
    "context": {
        "arguments": {
            "locales": [
                "en-US-u-fw-mon-mu-celsius",
                "fr-FR-u-fw-mon-mu-celsius"
            ]
        },
        "prev": {},
        "stash": {
            "nameToUse": "Nicolas",
            "user": {
                "id": "f094f76d-8042-4147-8123-59cae80a15e9",
                "legalFirstName": "Nicolas"
            }
        },
        "outErrors": []
    },
    "errors": [
        "Value for field '$[method]' not found."
    ],
    "graphQLAPIId": "{redacted}",
    "functionArn": "arn:aws:appsync:us-east-1:{redacted}:apis/{redacted}/functions/oi4omr5ocnbvfkpmk45noiajvy"

Let me know if you need anything else, Thank you.

[naedx]

(You should probably redact your ARNs, specifically the Account ID and the API ID followed by deleting the edit history of your post)