Delivery Stream Not Available as a Target for CloudWatch Logs, CloudWatch Events, or Amazon IoT Action - Amazon Kinesis Data Firehose
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Delivery Stream Not Available as a Target for CloudWatch Logs, CloudWatch Events, or Amazon IoT Action

Some Amazon services can only send messages and events to a Kinesis Data Firehose delivery stream that is in the same Amazon Region. Verify that your Kinesis Data Firehose delivery stream is located in the same Region as your other services.