LaravelGettext::setLocale() not working

[andrew26031990]

LaravelGettext::setLocale() not working properly. During executing this code in runtime, an error appeared.
Details:
Error: Using $this when not in object context in file C:\OpenServer\domains\bla-bla\vendor\zerospam\laravel-gettext\src\Xinax\LaravelGettext\LaravelGettext.php on line 68
` * @return string
*/
public function getLocale()
{
return $this->translator->getLocale();
}

/**
 * Set current locale
 *
 * @param string $locale
 * @return $this
 * @throws Exceptions\LocaleNotSupportedException
 * @throws \Exception
 */
public function setLocale($locale)
{
    **if ($locale != $this->getLocale()) {**
        $this->translator->setLocale($locale);
    }

    return $this;
}`

Please give me an answer.
Laravel version 8.65