> For the complete documentation index, see [llms.txt](https://docs.defguard.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.defguard.net/2.1/support-1/troubleshooting-guides/desktop-client/failed-to-parse-ip-address.md).
# Failed to parse IP address
This error indicates that the desktop client version is too old to communicate with the current core or Edge services. The client receives a response format it does not understand and fails to parse it.
Update the desktop client to the latest stable release:
After updating, retry the connection. No additional configuration changes are needed.
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