Fatal error: Uncaught GuzzleHttp\Exception\ClientException: Client error: `POST https://api.amazon.com/auth/o2/token` resulted in a `401 Unauthorized` response: {"error_description":"Client authentication failed","error":"invalid_client"} in /var/www/maptrotter/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php:113 Stack trace: #0 /var/www/maptrotter/vendor/guzzlehttp/guzzle/src/Middleware.php(72): GuzzleHttp\Exception\RequestException::create() #1 /var/www/maptrotter/vendor/guzzlehttp/promises/src/Promise.php(209): GuzzleHttp\Middleware::GuzzleHttp\{closure}() #2 /var/www/maptrotter/vendor/guzzlehttp/promises/src/Promise.php(158): GuzzleHttp\Promise\Promise::callHandler() #3 /var/www/maptrotter/vendor/guzzlehttp/promises/src/TaskQueue.php(52): GuzzleHttp\Promise\Promise::GuzzleHttp\Promise\{closure}() #4 /var/www/maptrotter/vendor/guzzlehttp/promises/src/Promise.php(251): GuzzleHttp\Promise\TaskQueue->run() #5 /var/www/maptrotter/vendor/guzzlehttp/promises/src/Promise.php(227): GuzzleHttp\Promise\Promise->invok in /var/www/maptrotter/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php on line 113