How to validate an array of files in laravel?

Question

Validation

Hello.
I have a site component - messages. Where can I attach images and office files.

in the view: In the controller:
<input type="file" name="attachments[]" multiple>

$request->validate([
            "item_id" => "required|exists:items,id",
            "message" => "required|max:2000",
            "attachments.*" => "nullable|mimes:jpeg,png,gif,docx,xlsx,ppsx",
        ]);

I get an error

The attachments.0 must be a file of type: jpeg, png, gif, docx, xlsx, ppsx.

I upload files strictly according to the memo type. I checked the online memo file type - everything converges.
But the file is not loading. Swears at everything

What could be the problem?

Answer 1

Decision. Forgot to mention that this form sends files
enctype="multipart/form-data">

Answer 2

Attachments itself should be an array, but nullable should be removed.
Use the dump() and dd() functions to check what is coming into the controller. Most likely the form was sent incorrectly.