要解决AWS CodePipeline与ECS蓝/绿部署内部发生的错误，您可以采取以下步骤：

1. 确保您的CodePipeline配置正确，包括源代码存储库、构建和部署阶段的设置。

2. 检查您的ECS集群和服务配置，确保它们正确地与CodePipeline集成。

下面是一个使用AWS CLI命令的代码示例，用于创建一个简单的CodePipeline与ECS蓝/绿部署的管道：

# 创建CodePipeline管道
aws codepipeline create-pipeline --cli-input-json file://pipeline.json

# pipeline.json文件内容示例
{
  "pipeline": {
    "name": "my-ecs-pipeline",
    "roleArn": "arn:aws:iam::123456789012:role/service-role/AWS-CodePipeline-Service",
    "artifactStore": {
      "type": "S3",
      "location": "my-bucket"
    },
    "stages": [
      {
        "name": "Source",
        "actions": [
          {
            "name": "Source",
            "actionTypeId": {
              "category": "Source",
              "owner": "ThirdParty",
              "provider": "GitHub",
              "version": "1"
            },
            "configuration": {
              "Owner": "my-github-account",
              "Repo": "my-repo",
              "Branch": "master",
              "OAuthToken": "my-github-token"
            },
            "outputArtifacts": [
              {
                "name": "SourceArtifact"
              }
            ]
          }
        ]
      },
      {
        "name": "Build",
        "actions": [
          {
            "name": "Build",
            "actionTypeId": {
              "category": "Build",
              "owner": "AWS",
              "provider": "CodeBuild",
              "version": "1"
            },
            "configuration": {
              "ProjectName": "my-codebuild-project"
            },
            "inputArtifacts": [
              {
                "name": "SourceArtifact"
              }
            ],
            "outputArtifacts": [
              {
                "name": "BuildArtifact"
              }
            ]
          }
        ]
      },
      {
        "name": "Deploy",
        "actions": [
          {
            "name": "Deploy",
            "actionTypeId": {
              "category": "Deploy",
              "owner": "AWS",
              "provider": "ECS",
              "version": "1"
            },
            "configuration": {
              "ClusterName": "my-ecs-cluster",
              "ServiceName": "my-ecs-service",
              "FileName": "imagedefinitions.json"
            },
            "inputArtifacts": [
              {
                "name": "BuildArtifact"
              }
            ]
          }
        ]
      }
    ]
  },
  "tags": [
    {
      "key": "my-key",
      "value": "my-value"
    }
  ]
}

请确保替换示例中的占位符（例如my-ecs-pipeline，my-bucket，my-github-account等）为您的实际值。

这只是一个简单的示例，您可能需要根据您的特定要求进行修改和扩展。

如果您遇到了特定的错误，请提供更多详细信息，以便我们能够为您提供更具体的解决方案。