Agent Error Fix

Windows · AI coding tools · exact errors

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Field notes for Codex, Claude Code, MCP, WSL, and VS Code — with exact error strings, affected versions, and first-hand sources.

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11launch fixes
0invented permanent fixes
1st-handsources linked on every page
Windowsnative, WSL, and Store builds

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One problem library, three focused hubs

01

Codex on Windows

Desktop, CLI, VS Code, Windows Sandbox, WSL, and configuration failures.

6 fixes 02

Claude Code

Native Windows, Desktop, Store builds, plugins, and local MCP startup failures.

4 fixes 03

MCP on Windows

NPX launch, filesystem path, Playwright, Context7, and stdio connection errors.

1 fixes

Reporter-confirmed first

High-confidence workarounds

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CodexPartial workaround

Fix “AbsolutePathBuf deserialized without a base path” in Codex on Windows

Invalid request: AbsolutePathBuf deserialized without a base path
4 min
CodexConfirmed workaround

Codex fatal error: “HW capability found … but requested …” on Windows

Fatal Error: HW capability found: 0x178BFBFF 0x7EF8320B, but HW capability requested: 0x200000 0x00
5 min
CodexConfirmed workaround

Fix “Windows cannot find codex-windows-sandbox-setup.exe”

Windows cannot find 'codex-windows-sandbox-setup.exe'
5 min
CodexConfirmed fix

Fix Codex config.toml “missing escaped value” on Windows

missing escaped value, expected b, e, f, n, r, \, quote, x, u, U
4 min
CodexConfirmed workaround

Codex WSL error: codex-linux-sandbox “doesn’t exist” (ENOENT)

Unable to spawn codex-linux-sandbox because it doesn't exist on the filesystem (ENOENT)
4 min
CodexConfirmed workaround

Fix “Unable to locate the Codex CLI binary” on Windows

Unable to locate the Codex CLI binary. Set CODEX_CLI_PATH or ensure the Electron resources include bin/codex.
4 min

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Confirmed workaround The original reporter or another first-hand user said the step restored operation.

Partial workaround The step helps one environment, but there may be more than one root cause.

Open issue We document safe diagnostics without pretending a permanent fix exists.