loadOptions always returns No sub-options

[ecuci]

My normalizer looks like this: normalizer(node) { return { id: node.id, label: node.name, children: node.child?.data, }; }

and I use both LOAD_CHILDREN_OPTIONS and ASYNC_SEARCH

when I set at case of LOAD_CHILDREN_OPTIONS
this: parentNode.child = { data: children }; or that: parentNode.child.data = children;

and then callback();

normalizer does not work and it says No sub-options all the time.