Issue with executeMethod OpenFile

I’m trying to open a template file from my custom plugin. I haven’t any errors and nothing happens. But by some reason result is undefined.
A size of uint8Array is exactly the same as the size of the file that I want to open.

const templateId = Asc.scope.step.data.template;

const template = await fetch(`http://localhost:3000/templates/${templateId}`);
const arrayBuffer = await template.arrayBuffer();
const uint8Array = new Uint8Array(arrayBuffer);

window.Asc.plugin.executeMethod('OpenFile', [uint8Array, ['id', `${templateId}.xlsx`]], function (result) {
  console.log('OpenFile.result', result);
});