'Object reference not set to an instance of an object.'-error when loading xsd

### Describe the Bug with repro steps

When choosing an xsd as a source- or targetschema for the data mapper I get an 'Object reference not set to an instance of an object.'-error. I don't know what this could mean in this context, the xsd's should be correct and the error-message is not very helpful. So I hope you can help me with it.

1. Put xsd's in \Artifacts\Schemas folder.
2. Create new data map in VS Code and give it a name.
3. Choose source schema (NPS\_Master\_BG\_full.xsd) and click Add.
4. Full error:

400 - InvalidSchema: The provided schema content is not valid. If the schema has any references, please upload the referenced schemas to the Integration Account first. The compilation of schema failed with error: 'Object reference not set to an instance of an object.'.

The same happens when you click 'Add new' instead of selecting an existing schema.

[xsd schemas.zip]()

### Screenshots or Videos

![error]()

### Version

Azure Logic Apps (Standard) - v4.44.9

### Additional context

*No response*