Carbon setLocale error on Google Bot

[gepopp]

Hello,
i've a Laravel App in the current version 12.19.3 and your package in version 1.0.22 installed.

Everything works fine when the page is opened in a browser but if i try to index the page via the google search console or run a text with google page speed insights it thows an 500 error because in the nesbot/Carbon/Laravel/ServiceProvider on line 80 the app->getLocale retuns false.

This only happens when the "auto" setting is set to true because the Carbon::setLocale used in the previous mentioned ServiceProvider expects a string.

So the auto browser language detection should return null or a string, null instead of false if no language is detected.