[instagram] Getting "None" when I use "{date:%Y-%m-%d}" in directory for downloading stories.

[lillytoo]

I want to arrange my downloaded stories by their dates, but when I use "{date:%Y-%m-%d}" in directory, I get "None".

    "instagram": {
        "include": "info,avatar,stories,posts",
  	"cookies"      : "login.txt",
        "sleep-request": "15-45",
        "sleep"        : "2-10",

        "posts": {
            "directory": ["instagram", "{username}", "Posts", "{date:%Y-%m-%d}"],
            "filename" : "{date:%Y-%m-%d}_{num} - {description[:90]} - {filename}.{extension}",
  		"order-files": "asc",
  		"metadata": true,
  		"postprocessors": ["metadata-insta"]
        },
        "stories": {
  		"directory": ["instagram", "{username}", "Stories", "{username} - {date:%Y-%m-%d}"],
            "filename" : "(Story){date:%Y-%m-%d}_{num}-{post_id}.{extension}",
            "order-files": "asc",
  		"metadata": true,
  		"postprocessors": ["metadata-insta"]
        },

        "api": "rest",
        "cursor": true,
        "max-posts": null,
  	"download-archive": true,
  	"archive-event": ["file", "skip"],
        "order-files": "asc",
        "order-posts": "asc",
        "previews": true,
        "videos": true

Output:

gallery-dl\instagram\banffphotography\Stories\banffphotography - None\

It works just fine when downloading posts instead.

gallery-dl\instagram\banffphotography\Posts\2023-06-19\