Fatal error: Uncaught TypeError: Twilio\Base\BaseClient::getAccountSid(): Return value must be of type string, null returned in /var/www/html/prod/vendor/twilio/sdk/src/Twilio/Base/BaseClient.php:365 Stack trace: #0 /var/www/html/prod/vendor/twilio/sdk/src/Twilio/Rest/Api/V2010.php(128): Twilio\Base\BaseClient->getAccountSid() #1 /var/www/html/prod/vendor/twilio/sdk/src/Twilio/Rest/Api/V2010.php(276): Twilio\Rest\Api\V2010->getAccount() #2 /var/www/html/prod/vendor/twilio/sdk/src/Twilio/Rest/Client.php(607): Twilio\Rest\Api\V2010->__get() #3 /var/www/html/prod/vendor/twilio/sdk/src/Twilio/Base/BaseClient.php(298): Twilio\Rest\Client->contextAvailablePhoneNumbers() #4 /var/www/html/prod/vendor/twilio/sdk/example/incomingPhoneNumber.php(16): Twilio\Base\BaseClient->__call() #5 /var/www/html/prod/vendor/twilio/sdk/example/incomingPhoneNumber.php(28): buyNumber() #6 {main} thrown in /var/www/html/prod/vendor/twilio/sdk/src/Twilio/Base/BaseClient.php on line 365