Array to string conversion at yii\mongodb/LogBuilder line 38

[ngbsoft]

public function generateToken($namespace, $data = []) { if (is_array($namespace)) { $namespace = implode('.', $namespace); } return $namespace . '(' . $this->encodeData($data) . ')'; }

I know it is not really an error but this line
$namespace = implode('.', $namespace);
=> break my app.

Just to let you guys know
PHP Warning
Array to string conversion
2
yii\base\ErrorException