ERROR_WINHTTP_UNABLE_TO_DOWNLOAD_SCRIPT

The PAC file cannot be downloaded. For example, the server referenced by the PAC URL may not have been reachable, or the server returned a 404 NOT FOUND response.

Matched as: the code as given (hex)

Other names

• ERROR_INTERNET_UNABLE_TO_DOWNLOAD_SCRIPT: The automatic proxy configuration script could not be downloaded. The INTERNET_FLAG_MUST_CACHE_REQUEST flag was set.

Source: WinHTTP Error Messages · CC-BY-4.0 (MicrosoftDocs/sdk-api, repo license verified 2026-10-09) · retrieved 2026-10-09