Minimal schema.json:
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"$id": "https://example.com/metadata-tree",
"$dynamicAnchor": "member",
"unevaluatedProperties": false
}
instance.json can be just {}.
$ jsonschema validate schema.json instance.json
unexpected error: map::at: key not found
Please report it at https://github.com/sourcemeta/jsonschema
$ jsonschema version
15.6.1
Minimal
schema.json:instance.jsoncan be just{}.