Fatal error: Uncaught League\OAuth2\Client\Provider\Exception\IdentityProviderException: invalid_client in /var/www/html/basti/upwork/php-upwork-oauth2/vendor/league/oauth2-client/src/Provider/GenericProvider.php:236 Stack trace: #0 /var/www/html/basti/upwork/php-upwork-oauth2/vendor/league/oauth2-client/src/Provider/AbstractProvider.php(740): League\OAuth2\Client\Provider\GenericProvider->checkResponse() #1 /var/www/html/basti/upwork/php-upwork-oauth2/vendor/league/oauth2-client/src/Provider/AbstractProvider.php(646): League\OAuth2\Client\Provider\AbstractProvider->getParsedResponse() #2 /var/www/html/basti/upwork/php-upwork-oauth2/src/Upwork/API/AuthTypes/OAuth2ClientLib.php(177): League\OAuth2\Client\Provider\AbstractProvider->getAccessToken() #3 /var/www/html/basti/upwork/php-upwork-oauth2/src/Upwork/API/AuthTypes/OAuth2ClientLib.php(131): Upwork\API\AuthTypes\OAuth2ClientLib->_requestTokens() #4 /var/www/html/basti/upwork/php-upwork-oauth2/src/Upwork/API/AuthTypes/AbstractOAuth.php(193): Upwork\API\AuthTypes\OAuth2ClientLib->_refreshTokens() #5 /var/www/html/basti/upwork/php-upwork-oauth2/src/Upwork/API/Client.php(126): Upwork\API\AuthTypes\AbstractOAuth->auth() #6 /var/www/html/basti/upwork/php-upwork-oauth2/myapp.php(58): Upwork\API\Client->auth() #7 {main} thrown in /var/www/html/basti/upwork/php-upwork-oauth2/vendor/league/oauth2-client/src/Provider/GenericProvider.php on line 236