[BUG] Code generation failed without any more info when updating to v7.11.0

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

Code generation works fine with v7.10.0, bumping to v7.11.0 fails with the following error:
`gradle clean build
executing gradlew instead of gradle

Task :openApiGenerate-sample FAILED

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':openApiGenerate-sample'.

Code generation failed.

• Try:

Run with --stacktrace option to get the stack trace.
Run with --info or --debug option to get more log output.
Run with --scan to get full insights.
Get more help at https://help.gradle.org.

BUILD FAILED in 3s
5 actionable tasks: 4 executed, 1 from cache`

openapi-generator version

Happens with v7.11.0, going back to v7.10.0 works. Is a regression.

OpenAPI declaration file content or url

Because of the lacking error message, I have no idea what causes it, and cannot make a minimal example. Need help debugging.

Generation Details

Using the current working yaml's (using 3 separate yamls)

Steps to reproduce

Same as above

Related issues/PRs

No related issues

Suggest a fix

No known fixes

Start with the Gradle task openApiGenerate-sample and reproduce the failure using the reported three YAML files, comparing v7.10.0 with v7.11.0. Run gradle clean build with --stacktrace, --info, or --debug; done means identifying the regression and restoring a useful error message or successful generation.