Organizational project templates not loading

### Product Version

- [ ] Amazon SageMaker Studio Classic
- [x] Amazon SageMaker Studio
- [ ] Issue is not related to SageMaker Studio

### Issue Description

When using custom project templates configured as **Organization Templates** , the Sagemaker Studio UI presents an error after selecting the template. No changes have been made to our underlying cloud formation product template.

Error message:

```
Error: Cannot read properties of undefined (reading 'length')
```

Relevant AWS Docs example: https://docs.aws.amazon.com/sagemaker/latest/dg/sagemaker-projects-templates-custom.html

### Expected Behavior

Once I select the organizational template, I can enter the project detail parameters and click create. The project is created based on the template.

### Observed Behavior

When an organizational template is selected and I click create:

The form renders for ~1 second


Then the error message is presented


### Product Category

Projects

### Feedback Category

User Interface

### Other Details

_No response_

No source files, tests, or entry points are identified in the report. Reproduce the failure when selecting an Amazon SageMaker Studio organizational project template, then trace the UI error and verify that project details can be entered and the project created successfully.

Written by the indexing model from the issue text.