Solution:
Adjust the APP_URL key under the .env file, which should be under your Laravel root dir, to reflect the correct path to the Laravel site. If you have a .htaccess file handling the rewrite then you may have to edit that as well.
Under the .htaccess file you may have to adjust RewriteBase / to better reflect the subdir laravel is now in.
Also look too see if $redirectTo is set under your AuthController.php, if so then adjust to fit your needs if not you could try setting it to fit your needs, such as protected $redirectTo = '/larvel-sub-folder/';