Why is the picture not downloading from My Warehouse?

Question

PHP

A few weeks ago I downloaded pictures from My Warehouse and everything worked fine.
I will give the code of functions for downloading:

public function saveImgMoySklad($imgUrl, $pathSave, $username, $password) {

    $auth = base64_encode("{$username}:{$password}");
    $context = stream_context_create([
        "http" => [
            "header" => "Authorization: Basic $auth"
        ]
    ]);
    $homepage = file_get_contents($imgUrl, false, $context);
    if ($homepage) {
        file_put_contents($pathSave, $homepage);
        return true;
    } else {
        return false;
    }
}

right now, a 403 error is generated, which means that there is no access to this function, although nothing has changed
if the same URl: https://online.moysklad.ru/api/remap/1.1/download/...
open in a browser and enter login and the password, then everything is fine - downloading
what could be the problem? support service does not answer questions about the API