这可能是由于在 ARM 模板的存储容器资源定义中使用了错误的语法或参数。以下是可能解决此问题的示例代码：

{
    "apiVersion": "2019-04-01",
    "type": "Microsoft.Storage/storageAccounts",
    "name": "[variables('storageAccountName')]",
    "location": "[parameters('location')]",
    "sku": {
        "name": "Standard_LRS"
    },
    "kind": "Storage",
    "properties": {
        "accessTier": "[parameters('accessTier')]",
        "supportsHttpsTrafficOnly": true
    },
    "resources": [
        {
            "type": "blobServices",
            "name": "default",
            "properties": {
                "cors": {
                    "corsRules": [
                        {
                            "allowedOrigins": ["*"],
                            "allowedMethods": ["GET"],
                            "maxAgeInSeconds": 86400,
                            "exposedHeaders": ["*"],
                            "allowedHeaders": ["*"]
                        }
                    ]
                },
                "deleteRetentionPolicy": {
                    "enabled": true,
                    "days": 30
                }
            },
            "resources": [
                {
                    "type": "containers",
                    "name": "testContainer1"
                },
                {
                    "type": "containers",
                    "name": "testContainer2"
                }
            ]
        }
    ]
}

在上面的代码中，我们在 "blobServices" 资源下定义了 "containers" 资源，并在其中包含了 "testContainer1" 和 "testContainer2"。确保您在数组类型的资源定义中使用正确的语法和参数。