Facebook PHP API throwing exception while login

I tried to log in with Facebook Graph API and get user info. The code I used to get user info worked before but today I tried login with facebook but Facebook API throwing this error.

Undefined offset: 1
/home/****/vendor/facebook/php-sdk-v4/src/Facebook/Http/GraphRawResponse.php on line 108

The line is in this function:

public function 
setHttpResponseCodeFromHeader($rawResponseHeader)
{
    preg_match('|HTTP/d.ds+(d+)s+.*|', $rawResponseHeader, $match);
    $this->httpResponseCode = (int)$match[1]; // <---- HERE
}

My Code :

    $fb = new Facebook([
        'app_id' => Data::get('fbAppId'),
        'app_secret' => Data::get('fbAppSec'),
        'default_graph_version' => 'v2.5',
    ]);

    $helper = $fb->getRedirectLoginHelper();
    $_SESSION['FBRLH_state'] = $_GET['state'];

    try {
        $accessToken = $helper->getAccessToken();
        $_SESSION['token'] = $accessToken;
        DB::table('settings')->where('userId', Auth::user()->id)->update(['fbAppToken' => $accessToken]); // save user access token to database
        $this->saveFbPages(); // save facebook pages and token
        $this->saveFbGroups(); // save facebook groups to database

    } catch (FacebookResponseException $e) {
        // When Graph returns an error
        return '[a] Graph returned an error: ' . $e->getMessage();

    } catch (FacebookSDKException $e) {
        // When validation fails or other local issues
        return '[a] Facebook SDK returned an error: ' . $e->getMessage();

    }