Exception when calling aPlusContentV20201101->SearchContentDocuments: Bad Request (400)

[TonyMarston]

Problem description:

I am calling aPlusContentV20201101->SearchContentDocuments with a marketplaceId, but it fails

Error:

Exception when calling aPlusContentV20201101->SearchContentDocuments: Bad Request (400) Response: { "errors": [ { "code": "InvalidInput", "message": "Could not match input arguments", "details": "" } ] }

Code

use SellingPartnerApi\SellingPartnerApi;
use SellingPartnerApi\Enums\Endpoint;

$connector = SellingPartnerApi::seller(
    clientId: $client_id,
    clientSecret: $client_secret,
    refreshToken: $refresh_token,
    endpoint: Endpoint::{$endpoint}
);

$api = $connector->aPlusContentV20201101();
try {
    $result = $api->SearchContentDocuments(
        marketplaceId: $marketplace_id);
    print_r($result);
} catch (Exception $e) {
    echo 'Exception when calling aPlusContentV20201101->SearchContentDocuments: ',
        $e->getMessage(),
        PHP_EOL;
}