> For the complete documentation index, see [llms.txt](https://help.security.gallagher.com/knowledge-hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.security.gallagher.com/knowledge-hub/products/cc-software/troubleshoot/command-centre-errors/command-centre-errors-logon-prompt-doe.md).

# Logon prompt does not appear after logging off Command Centre Client

[Command Centre - Errors](/knowledge-hub/products/cc-software/troubleshoot/command-centre-errors.md) › Logon prompt does not appear after logging off Command Centre Client

Occurs due to the lack of support for the latest WebView control (introduced in **v9.30**) on earlier Windows operating systems such as **Windows Server 2016**.

```
AIM Version: 9.30.2427.0 Error Hash: e953e1de269
System.TypeLoadException: Could not find Windows Runtime type 'Windows.Graphics.SizeInt32'.
   at Microsoft.Web.WebView2.Wpf.WebView2CompositionControl.Dispose()
   at Gallagher.Security.Client.WebPortalAdminViewerPresenter.Dispose(Boolean disposing)
```

![Logon prompt WebView2 error log](https://328339335-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6bM8WhlBE9BYizPWJaPN%2Fuploads%2Fgit-blob-61d549b1091439ea5339dbbbce9c7a780415db55%2FSECHUB-CCS-ERR-LOGON-PROMPT-01.png?alt=media)

## Solution

Add the following registry setting in CCFT:

```
UseLegacyWebViewControl=1 (DWORD32)
```


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