PHP SDK : 2 warnings and no response

Hello, I'm trying to connect to your API, I followed all your instructions from your docs (Register your application, Installation, Configuration, Token Persistence etc.. )

I decided to use File Persistence and tried to execute the "Get Current User's sample", by passing all of my credentials to the $configuration array. Here is my $configuration array :

$configuration=array(
            "client_id" => "XXXXXXXXXXXXXXXXXX",
            "client_secret" => "XXXXXXXXXXXXXXX",
            "redirect_uri" => "XXXXXXXXXXXXXXX",
            "currentUserEmail" => "XXXXXXXXXXX",
            "token_persistence_path" => __DIR__ . "/TokenStorage",
            "apiBaseUrl" => "https://www.zohoapis.eu",
            "accounts_url" => "https://accounts.zoho.eu",
            "access_type" => "offline",
            "apiVersion"=>"v2"

        );

Here are the warnings :

Warning: array_key_exists() expects parameter 2 to be array, null given in /Library/WebServer/Documents/vendor/zohocrm/php-sdk/src/crm/api/response/BulkAPIResponse.php on line 184
Warning: Invalid argument supplied for foreach() in /Library/WebServer/Documents/vendor/zohocrm/php-sdk/src/crm/api/handler/OrganizationAPIHandler.php on line 661

I've tried to execute more simple codes but I always get the same warnings and no response. Can you please help me fix this? Do you need my code?

I don't think the token has expired since I don't get any errors regarding Token expiration .

Thanks,