CDK Kendra FAQ Creation failure with GeneralServiceException

I am trying to create Kendra FAQs with the code snippet below and it is failing with either DescribeIndex failure or GeneralServiceException.

const KENDRA_FAQ_KEYS = ['tnc', 'sns', 'Route53', 's3', 'TechnicalSupport', 'aurora', 'BillingandAccount', 'CloudFront', 'connect', 'DynamoDB', 'EBS', 'EC2', 'ElasticBeanstalk', 'fargate', 'IAM', 'lambda', 'product_faq1', 'product_faq2', 'Redshift'];

for (let i=0; i<KENDRA_FAQ_KEYS.length; i++) {
      const faq = KENDRA_FAQ_KEYS[i];
      const currentFAQ = new CfnFaq(this, `Kendra-FAQ-${faq}`, {
        indexId: kendraIndex.attrId,
        name: faq,
        roleArn: faqRole.roleArn,
        s3Path: {
          bucket: kendraBucket.bucketName,
          key: `kendra-faqs/${faq}.csv`,
        },
        fileFormat: 'CSV_WITH_HEADER',
      });

      if (prevFAQ) { // this is to test if there is a DescribeIndex throttling issue (seems like it...)
        currentFAQ.addDependsOn(prevFAQ);
        prevFAQ = currentFAQ;
      }
    }

Sample errors

1:22:29 PM | CREATE_FAILED        | AWS::Kendra::Faq            | Kendra-FAQ-s3
Unable to retrieve Id attribute for AWS::Kendra::Index, with error message Error
occurred during operation 'DescribeIndex'.
1:22:29 PM | CREATE_FAILED        | AWS::Kendra::Faq            | Kendra-FAQ-Tech
nicalSupport
Resource handler returned message: "Error occurred during operation 'CreateFaq'."
(RequestToken: 36cbaa78-9e73-2485-a4c6-8f6a20f2957d, HandlerErrorCode: GeneralSer
viceException)