## TL;DR
Supply the missing required property the error names. For `aws.S3BucketServerSideEncryptionConfigurationRule`, add `applyServerSideEncryptionByDefault` with your `sseAlgorithm` inside it.

## The error
```
jsii.errors.JSIIError: Missing required properties for aws.S3BucketServerSideEncryptionConfigurationRule: applyServerSideEncryptionByDefault
```

## Fix it
1. Read the construct type in the error (`aws.S3BucketServerSideEncryptionConfigurationRule`) and the missing property (`applyServerSideEncryptionByDefault`).
2. Find where you configure that block in your stack code (e.g. the `serverSideEncryptionConfiguration` of an S3 bucket).
3. Nest the required property correctly. Python example:
   ```python
   server_side_encryption_configuration={
       "rule": {
           "apply_server_side_encryption_by_default": {
               "sse_algorithm": "aws:kms"
           }
       }
   }
   ```
   TypeScript example:
   ```ts
   serverSideEncryptionConfiguration: {
     rule: {
       applyServerSideEncryptionByDefault: { sseAlgorithm: "aws:kms" },
     },
   },
   ```
4. Re-run `cdktf synth` and confirm the JSIIError is gone.

Expected result: synth completes and the S3 bucket resource appears in `cdk.tf.json` with the encryption block.

## When to use this
- `cdktf synth` raises `JSIIError: Missing required properties for [type]: [property]`
- You passed a nested block (encryption, versioning, logging) as a flat dict instead of the required nested shape

## When NOT to use this
- The error is a TypeScript compile error (TS2305 etc.) about a missing export, not a JSII runtime error
- Terraform plan rejects the value *after* synth succeeds (that is provider-side validation, a different stage)

## Root cause
The jsii kernel validates required properties when a construct is created, before any Terraform JSON is generated. CDKTF provider bindings mark nested blocks required by the provider schema, and many AWS blocks (like the S3 SSE rule) require a wrapper object even when you only want to set one inner field. Passing `"sse_algorithm": "aws:kms"` directly at the rule level skips the mandatory `applyServerSideEncryptionByDefault` wrapper, so the kernel rejects the construct.

## Edge cases
- Property naming differs by language: `applyServerSideEncryptionByDefault` (TS), `apply_server_side_encryption_by_default` (Python), `ApplyServerSideEncryptionByDefault` (Go).
- Some blocks require the wrapper even when empty; check the provider schema via `cdktf get`-generated docs when unsure.