Unhelpful error message when deploying Cloudflare::Dns::Record

[stevengubler]

While deploying a Cloudflare::Dns::Record resource, the Cloudformation console gives me the following error, (with the request token redacted):

Resource handler returned message: "Cannot read property 'length' of undefined" (RequestToken: XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX, HandlerErrorCode: InternalFailure)

It's possible I've done something incorrect, but nothing from the error is actionable. It is difficult to know what to do about it without more information.

Diagnostic information:

• Version: 1.1.0
• Region: us-east-1
• Type configuration, (with the name of the secret redacted):

  {
      "CloudflareAccess": {
          "ApiKey": "{{resolve:secretsmanager:XXXXXXXX}}",
          "Url": "https://api.cloudflare.com/client/v4"
      }
  }

• Cloudformation code, (rendered, reduced, and redacted):

  {
    "Properties": {
      "Content": { "Fn::GetAtt": "FrontendLoadBalancer.DNSName" },
      "Name": { "Fn::Sub": "${Subdomain}.${ZoneDomainName}" },
      "Proxied": true,
      "Ttl": 1,
      "Type": "CNAME",
      "ZoneId": { "Ref": "ZoneId"}
    },
    "Type": "Cloudflare::Dns::Record"
  }

Like I said earlier, I might be doing something wrong; however, even if that's the case, I would still think it's a bug that a better error isn't being reported.