Binding "Open with Inkdown" produces an "invalid argument 'resource'" error

[tsbertalan]

"Open with Inkdown" works on right-click menu in the Explorer View in vscode, but if I bind it to a keyboard shortcut like e.g. (keybindings.json)

    {
        "key": "ctrl+shift+alt+i",
        "command": "inkdown.openEditor"
    }

and invoke it when a md file is opened with the regular text editor, I get

Invalid argument 'resource' when running 'vscode.openWith', received: undefined 

[1943time]

Currently, inkdown does not support opening directly using commands. It is recommended to open it by clicking with the mouse. The next version will try to be compatible with the command opening method.