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Could it be related to this? <https://github.com/pulumi/pulumi/issues/5819>

thanks <@U012UJTT55M>, I think it's related to either <https://github.com/pulumi/pulumi-azure/issues/454> or <https://github.com/pulumi/pulumi-azure/issues/383>

```    panic: interface conversion: interface {} is nil, not map[string]interface {}
    goroutine 119 [running]:
    <http://github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/services/web.expandAppServiceLogs(0x4d970c0|github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/services/web.expandAppServiceLogs(0x4d970c0>, 0xc001ebc420, 0x4, 0x4d970c0, 0xc001ebc420, 0x1)```

Looks like 383 is done, so long as you have a recent pulumi and pulumi-azure. The remaining issue is triggered only when your AppService's applicationLogs is set to {}. Maybe you could provide a different value there?

thank you, I wasn't providing any application logs so I guess that makes sense, do you have an example value that I can pass with C#?

no worries, I'll keep digging :thumbsup: thank you for your help

Here's the reference docs: <https://www.pulumi.com/docs/reference/pkg/azure/appservice/appservice/#appservicelogsapplicationlogs>

yeah, I'm going through those but being new to C# also doesn't help :smile:

```                Logs = new AppServiceLogsArgs()
                {
                    ApplicationLogs = new AppServiceLogsApplicationLogsArgs()
                    {
                        FileSystemLevel = "Error" 
                    }
                },```
I've put that in there (which compiles but I don't know how correct it is) but I got the same error

Maybe <@UB39JFCKC> can say more.. though it's Christmas, so it might be a while!

all good, not in a hurry, I was just curious

I just deleted my stack and tried again. Creating it for the first time worked, the update didn't (same error). Seems <https://github.com/pulumi/pulumi-azure/issues/383|https://github.com/pulumi/pulumi-azure/issues/383 is> still happening

```    logs                          : {
        applicationLogs: {
            fileSystemLevel : "Off" =&gt; "Error"
        }
        httpLogs       : {
            fileSystem      : null =&gt; {"retentionInDays":14,"retentionInMb":35}
        }
    }```

I updated my code to include
```                Logs = new AppServiceLogsArgs()
                {
                    HttpLogs = new AppServiceLogsHttpLogsArgs()
                    {
                        FileSystem = new AppServiceLogsHttpLogsFileSystemArgs()
                        {
                            RetentionInDays = 14,
                            RetentionInMb = 35
                        }
                    },
                    ApplicationLogs = new AppServiceLogsApplicationLogsArgs()
                    {
                        FileSystemLevel = "Error"
                    }
                },```

alright, it's this: <https://github.com/pulumi/pulumi-azure/issues/740>