Class "OneOfStringNumberMap" not found

Hello everyone,
I am trying to integrate the pipedrive PHP SDK. It seems that there are several issues with it.
Notably, the fact that there is a required OneOfStringNumberMap class, yet it seems to be missing.
Is there a fix that would allow it to work?
Thank you all.

Hi and welcome! Could you please share a minimal code snippet that would help us reproduce the issue? Thanks!

Thank you! There it is:

<?php

use GuzzleHttp\Client;
use Pipedrive\versions\v2\Api\PersonsApi;

class Test 
{
    private const API_KEY_IDENTIFIER = 'x-api-token';

    public function test()
    {
        $id = 42;
        $configV2 = (new ConfigurationV2())->setApiKey(
            self::API_KEY_IDENTIFIER,
            'xxxxxxx'
        );

        $client = new Client();
        $personsApi = new PersonsApi($client, $configV2);

        $personsApi->getPerson($id);
    }
}