"The source path must be contained in the project root folder"

I'm new to VS Code and now trying to convert an Eclipse project to VS Code.
I have multiple Java projects stored in a common folder.
Each project have its own .vscode/settings.json file.
The projects refer to each other on source level as which requires cross-project references.
The projects are unmanaged using VS Code terminology.

Environment

• Operating System: Mac Sonoma 14.4.1
• JDK version: 21
• Visual Studio Code version: 1.88.1
• Java extension version: 1.29

Steps To Reproduce

1. Try to add a source path from another project in the folder.
   Then you get the error message from the issue.

[Please attach a sample project reproducing the error]
Please attach logs

Current Result

Expected Result

Additional Informations

If this will be addressed, I think "sourcePaths" should permit relative and absolute paths to any folder.

Empieza reproduciendo el error con varios proyectos Java y sus archivos .vscode/settings.json. Inspecciona cómo se valida la configuración sourcePaths cuando hace referencia a una carpeta fuera de la raíz del proyecto. La tarea estará terminada cuando se acepte la ruta de origen entre proyectos prevista y exista cobertura de regresión para la configuración indicada.