Call to a member function getDefault() on bool

/var/www/html/projectname/vendor/o2system/spl/src/Exceptions/Abstracts/AbstractException.php
     */
    public function __construct($message, $code = 0, array $context = [], \Exception $previous = null)
    {
        if (class_exists('O2System\Kernel', false)) {
            $classInfo = new SplClassInfo($this);
            $classNameParts = explode('\\', $classInfo->getClass());
            $classParameter = strtolower(end($classNameParts));
            $classLanguageDirectory = dirname($classInfo->getFileInfo()->getRealPath()) . DIRECTORY_SEPARATOR . 'Languages' . DIRECTORY_SEPARATOR;

            if (false !== ($exceptionKey = array_search('Exception', $classNameParts)) OR
                false !== ($exceptionKey = array_search('Exceptions', $classNameParts))
            ) {
                if (isset($classNameParts[ $exceptionKey - 1 ])) {
                    $classParameter = $classNameParts[ $exceptionKey - 1 ];

                }
            }

            $this->view = strtolower($classParameter . '_' . $this->view);
            $languageFilename = strtolower($classParameter) . '_' . language()->getDefault() . '.ini';
            $languageKey = strtoupper($classParameter . '_exception');
            language()->loadFile($classLanguageDirectory . $languageFilename);

            $this->header = language()->getLine('E_HEADER_' . $languageKey);
            $this->description = language()->getLine('E_DESCRIPTION_' . $languageKey);
            $message = language()->getLine($message, $context);
        }

        parent::__construct($message, $code, $previous);
    }

    // ------------------------------------------------------------------------

    /**
     * AbstractException::getHeader
     *
     * Gets exception header.
     *
     * @return string
     */
Arguments
"Call to a member function getDefault() on bool"

Ada yang bisa bantu masalah di atas ? Saya menggunakan laravel versi 5.8

Di bawah ini adalah konfigurasi saya

$config['api_key'] = env('RAJAONGKIR_KEY');
$config['account_type'] = env('RAJAONGKIR_ACCOUNT_TYPE','starter');
$rajaongkir = new Rajaongkir($config);

steevenz / rajaongkir

Call to a member function getDefault() on bool #15