Github/php & Facebook/php both seem to be giving me"invalid state"

i am asking this question again, since a bit of further research is actually showing a different error. when i use the example script below, i am indeed able to log in very successfully using both Auth0 and Google. however, when i attempt to log in with either Facebook or Github, i get the following error: $userInfo = $auth0->getUser(); // line 22 PHP Fatal error: Uncaught Auth0\SDK\Exception\CoreException: Invalid state in /var/www/html/auth0/vendor/auth0/auth0-php/src/Auth0.php:558\nSt...

23 Oct 2019 ... require 'vendor/autoload.php'; use Auth0\SDK\Auth0; $auth0 = new Auth0([ ' domain' => 'dev-y-XXXXXXXm.auth0.com', 'client_id' => ' ...

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