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IPv6 misconfiguration on Linux Mint caused Codex VS Code extension to load blank

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A developer running the OpenAI Codex extension on VS Code in Linux Mint 22.3 encountered a completely blank interface with no error messages displayed. Extension logs revealed repeated failures to sync the plugin catalog with ChatGPT endpoints and a curated plugin repository hosted on GitHub. Further investigation showed that IPv6 was present on the system but lacked functional external connectivity, causing network requests to fail silently. Disabling IPv6 or forcing IPv4 for outbound connections resolved the plugin sync failures and restored the extension interface. The case highlights how a broken IPv6 stack can silently disrupt developer tools that do not surface clear network error messages to end users.

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IPv6 misconfiguration on Linux Mint caused Codex VS Code extension to load blank · ShortSingh