Fatal error: Uncaught ConvertApi\Error\Api: User credentials not set, secret or token must be passed. Code: 4013 in /var/www/html/scorm/vendor/convertapi/convertapi-php/lib/ConvertApi/Client.php:164 Stack trace: #0 /var/www/html/scorm/vendor/convertapi/convertapi-php/lib/ConvertApi/Client.php(121): ConvertApi\Client->checkResponse(Resource id #4, '{"Code":4013,"M...') #1 /var/www/html/scorm/vendor/convertapi/convertapi-php/lib/ConvertApi/Client.php(21): ConvertApi\Client->execute(Resource id #4) #2 /var/www/html/scorm/vendor/convertapi/convertapi-php/lib/ConvertApi/Task.php(38): ConvertApi\Client->post('convert/pdf/to/...', Array, 1800) #3 /var/www/html/scorm/vendor/convertapi/convertapi-php/lib/ConvertApi/ConvertApi.php(92): ConvertApi\Task->run() #4 /var/www/html/scorm/vendor/convertapi/convertapi-php/examples/create_pdf_thumbnail.php(18): ConvertApi\ConvertApi::convert('extract', Array) #5 {main} thrown in /var/www/html/scorm/vendor/convertapi/convertapi-php/lib/ConvertApi/Client.php on line 164