Calling the invoke API action failed with this message: Network Failure timeout. Using Lambda

I am trying to invoke a lambda to store data in a Dynamodb table. In my own AWS account, it works, but not in the company AWS account I'm working at. Cloudwatch does not show any errors. The timeout occurs at "await dynamodb.describeTable(describeParams).promise();".

My code is as follows:

const AWS = require('aws-sdk');
const docClient = new AWS.DynamoDB.DocumentClient();
const dynamodb = new AWS.DynamoDB();

exports.handler = async (event) => {
  const valueTostore = event.body || 'default_value';

  const params = {
    TableName: 'my-values',
    Item: {
      id: new Date().toISOString(),
      SessionConfig: valueTostore
    }
  };

  try {
    const describeParams = { TableName: 'my-values' };
    await dynamodb.describeTable(describeParams).promise();
  } catch (error) {
    const response = {
      statusCode: 500,
      body: JSON.stringify({ message: 'Error while accessing table' })
    };
    return response;
  }

  try {
    await docClient.put(params).promise();
  } catch (error) {
    const response = {
      statusCode: 500,
      body: JSON.stringify({ message: 'Error while storing value' })
    };
    return response;
  }

  const response = {
    statusCode: 200,
    body: JSON.stringify({ message: 'Value stored successfully' })
  };
  return response;
};