Our API is trying to create a new account. This has worked before with another project/master account. The manager account id was given, yet it gave a NOT_AUTHORIZED error.
297 <190>1 2016-08-16T06:38:50.590915+00:00 app worker.1 - - Exception SoapFault exception: [soap:Server] [ManagedCustomerServiceError.NOT_AUTHORIZED @ operations[0]] in /app/vendor/googleads/googleads-php-lib/src/Google/Api/Ads/Common/Lib/AdsSoapClient.php:216
109 <190>1 2016-08-16T06:38:50.590929+00:00 app worker.1 - - Stack trace:
253 <190>1 2016-08-16T06:38:50.590930+00:00 app worker.1 - - #0 /app/vendor/googleads/googleads-php-lib/src/Google/Api/Ads/Common/Lib/AdsSoapClient.php(216): SoapClient->__soapCall('mutate', Array, NULL, Array, Array)
240 <190>1 2016-08-16T06:38:50.590932+00:00 app worker.1 - - #1 /app/vendor/googleads/googleads-php-lib/src/Google/Api/Ads/AdWords/Lib/AdWordsSoapClient.php(86): AdsSoapClient->__soapCall('mutate', Array)
255 <190>1 2016-08-16T06:38:50.590932+00:00 app worker.1 - - #2 /app/vendor/googleads/googleads-php-lib/src/Google/Api/Ads/AdWords/v201605/ManagedCustomerService.php(4608): AdWordsSoapClient->__soapCall('mutate', Array)
174 <190>1 2016-08-16T06:38:50.590933+00:00 app worker.1 - - #3 /app/models/GoogleAdWords.php(1460): ManagedCustomerService->mutate(Array)
I can list accounts fine.
$ YII_ENV=prod yii kw/list-accounts
4342976991, BestSales, manage?: 1, test?:
5336143149, BestSales 1, manage?: , test?:
This is what I see in the AdWords web interface.

I don't even see a button to create an account in the AdWords web interface either. When I try to create an account, I'm using the account number with dashes, but I don't think that should matter because it works for fetching account numbers. Do you want to see the code which tries to create the account? The version of API I'm using is v201605.