how to download instagram specific name with avatar

[nongtor01]

I'm try with this format but it not work for avatar
"filename": "{date:%Y-%m-%d}_{filename}.{extension}"

[instagram][error] FilenameFormatError: Applying filename format string failed (TypeError: unsupported format string passed to NoneType.__format__)

Is there any way to fix it?
Thank you in advance.

[mikf]

Use :? to ignore empty date values

"filename": "{date:?/_/%Y-%m-%d}{filename}.{extension}"

or use an avatar-specific filename format.

        "instagram": {
             "filename": "{date:%Y-%m-%d}_{filename}.{extension}",
             "avatar": {
                "filename": "{filename}.{extension}"
             }
        }

[nongtor01]

It works well, Thank you very much. 👍