Chrome and Edge network error codes

Codes such as ERR_CONNECTION_RESET or ERR_NAME_NOT_RESOLVED come from the network stack shared by Google Chrome, Microsoft Edge, Brave, Opera and other Chromium browsers. They describe where a request failed: DNS lookup, the TCP connection, the TLS handshake, a proxy, or the response itself.

Most of them are caused by something between your device and the website — Wi-Fi, a VPN, a proxy or antivirus web filter — rather than by the site. Each page explains how to tell the two apart before you change any settings.

266 codes · showing 1–100 · most-searched codes first

ERR_FAILEDBROWSER-2A generic failure occurred. ERR_FILE_NOT_FOUNDBROWSER-6The file or directory cannot be found. ERR_TIMED_OUTBROWSER-7The site can't be reached — taking too long to respond. ERR_SOCKET_NOT_CONNECTEDBROWSER-15The socket is not connected. ERR_BLOCKED_BY_CLIENTBROWSER-20Blocked by client — usually an extension. ERR_NETWORK_CHANGEDBROWSER-21A network change was detected. ERR_BLOCKED_BY_ADMINISTRATORBROWSER-22The request was blocked by an administrator policy. ERR_BLOCKED_BY_RESPONSEBROWSER-27The request was blocked by a security header in the server response. ERR_CLEARTEXT_NOT_PERMITTEDBROWSER-29Unencrypted (cleartext HTTP) traffic is not permitted. ERR_CONNECTION_CLOSEDBROWSER-100A connection was closed (corresponding to a TCP FIN). ERR_CONNECTION_RESETBROWSER-101The connection was reset. ERR_CONNECTION_REFUSEDBROWSER-102The site can't be reached — connection refused. ERR_CONNECTION_ABORTEDBROWSER-103This can include a FIN packet that did not get ACK'd. ERR_CONNECTION_FAILEDBROWSER-104A connection attempt failed. ERR_NAME_NOT_RESOLVEDBROWSER-105The web address could not be resolved. ERR_INTERNET_DISCONNECTEDBROWSER-106Your internet access is lost. ERR_SSL_PROTOCOL_ERRORBROWSER-107A fatal SSL protocol error occurred. ERR_ADDRESS_UNREACHABLEBROWSER-109The IP address is unreachable: there is no route to the host or network. ERR_TUNNEL_CONNECTION_FAILEDBROWSER-111A tunnel connection through the proxy could not be established. ERR_SSL_VERSION_OR_CIPHER_MISMATCHBROWSER-113A secure connection could not be established. ERR_CONNECTION_TIMED_OUTBROWSER-118The connection has timed out. ERR_PROXY_CONNECTION_FAILEDBROWSER-130The browser could not connect to the configured proxy server. ERR_NAME_RESOLUTION_FAILEDBROWSER-137An error occurred when trying to do a name resolution (DNS). ERR_CERT_COMMON_NAME_INVALIDBROWSER-200The certificate doesn't match the domain. ERR_CERT_DATE_INVALIDBROWSER-201The certificate has expired or is not yet valid. ERR_CERT_AUTHORITY_INVALIDBROWSER-202The certificate is not signed by a trusted authority. ERR_CERT_REVOKEDBROWSER-206The server certificate has been revoked. ERR_UNKNOWN_URL_SCHEMEBROWSER-302The scheme of the URL is unknown. ERR_TOO_MANY_REDIRECTSBROWSER-310This page isn't working — redirected you too many times. ERR_UNSAFE_PORTBROWSER-312The request was blocked because the port is restricted as unsafe. ERR_INVALID_RESPONSEBROWSER-320The server's response was invalid. ERR_EMPTY_RESPONSEBROWSER-324The server didn't send any data. ERR_CONTENT_DECODING_FAILEDBROWSER-330Content decoding of the response body failed. ERR_HTTP2_PROTOCOL_ERRORBROWSER-337The server had a protocol error. ERR_INCOMPLETE_CHUNKED_ENCODINGBROWSER-355The server closed the connection before finishing a chunked response. ERR_QUIC_PROTOCOL_ERRORBROWSER-356There is a QUIC protocol error. ERR_CACHE_MISSBROWSER-400The cache does not have the requested entry. ERR_IO_PENDINGBROWSER-1An asynchronous IO operation is not yet complete. ERR_ABORTEDBROWSER-3An operation was aborted (due to user action). ERR_INVALID_ARGUMENTBROWSER-4An argument to the function is incorrect. ERR_INVALID_HANDLEBROWSER-5The handle or file descriptor is invalid. ERR_FILE_TOO_BIGBROWSER-8The file is too large. ERR_UNEXPECTEDBROWSER-9An unexpected error. ERR_ACCESS_DENIEDBROWSER-10Permission to access a resource, other than the network, was denied. ERR_NOT_IMPLEMENTEDBROWSER-11The operation failed because of unimplemented functionality. ERR_INSUFFICIENT_RESOURCESBROWSER-12There were not enough resources to complete the operation. ERR_OUT_OF_MEMORYBROWSER-13Memory allocation failed. ERR_UPLOAD_FILE_CHANGEDBROWSER-14The file upload failed because the file's modification time was different from the expectation. ERR_FILE_EXISTSBROWSER-16The file already exists. ERR_FILE_PATH_TOO_LONGBROWSER-17The path or file name is too long. ERR_FILE_NO_SPACEBROWSER-18Not enough room left on the disk. ERR_FILE_VIRUS_INFECTEDBROWSER-19The file has a virus. ERR_SOCKET_IS_CONNECTEDBROWSER-23The socket is already connected. ERR_UPLOAD_STREAM_REWIND_NOT_SUPPORTEDBROWSER-25The upload failed because the upload stream needed to be re-read, due to a retry or a redirect, but the… ERR_CONTEXT_SHUT_DOWNBROWSER-26The request failed because the URLRequestContext is shutting down, or has been shut down. ERR_BLOCKED_BY_CSPBROWSER-30The request was blocked by a Content Security Policy ERR_H2_OR_QUIC_REQUIREDBROWSER-31H2 or quic required ERR_BLOCKED_BY_ORBBROWSER-32The request was blocked by CORB or ORB. ERR_NETWORK_ACCESS_REVOKEDBROWSER-33The request was blocked because it originated from a frame that has disabled network access. ERR_BLOCKED_BY_FINGERPRINTING_PROTECTIONBROWSER-34The request was blocked by fingerprinting protections. ERR_BLOCKED_IN_INCOGNITO_BY_ADMINISTRATORBROWSER-35The request was blocked by the Incognito Mode URL block list configured by the domain administrator. ERR_LOCAL_NETWORK_PERMISSION_MISSINGBROWSER-36The request was blocked because the local network permission is missing. ERR_STRICT_ECH_REQUIREDBROWSER-37The request was blocked because ECH is strictly required, but: - The client could not obtain a valid ECH… ERR_ADDRESS_INVALIDBROWSER-108The IP address or port number is invalid (e.g., cannot connect to the IP address 0 or the port 0). ERR_SSL_CLIENT_AUTH_CERT_NEEDEDBROWSER-110The server requested a client certificate for SSL client authentication. ERR_NO_SSL_VERSIONS_ENABLEDBROWSER-112Obsolete: ERR_SSL_RENEGOTIATION_REQUESTEDBROWSER-114The server requested a renegotiation (rehandshake). ERR_PROXY_AUTH_UNSUPPORTEDBROWSER-115The proxy requested authentication (for tunnel establishment) with an unsupported method. ERR_BAD_SSL_CLIENT_AUTH_CERTBROWSER-117The SSL handshake failed because of a bad or missing client certificate. ERR_HOST_RESOLVER_QUEUE_TOO_LARGEBROWSER-119There are too many pending DNS resolves, so a request in the queue was aborted. ERR_SOCKS_CONNECTION_FAILEDBROWSER-120Failed establishing a connection to the SOCKS proxy server for a target host. ERR_SOCKS_CONNECTION_HOST_UNREACHABLEBROWSER-121The SOCKS proxy server failed establishing connection to the target host because that host is unreachable. ERR_ALPN_NEGOTIATION_FAILEDBROWSER-122The request to negotiate an alternate protocol failed. ERR_SSL_NO_RENEGOTIATIONBROWSER-123The peer sent an SSL no_renegotiation alert message. ERR_WINSOCK_UNEXPECTED_WRITTEN_BYTESBROWSER-124Winsock sometimes reports more data written than passed. ERR_SSL_DECOMPRESSION_FAILURE_ALERTBROWSER-125An SSL peer sent us a fatal decompression_failure alert. ERR_SSL_BAD_RECORD_MAC_ALERTBROWSER-126An SSL peer sent us a fatal bad_record_mac alert. ERR_PROXY_AUTH_REQUESTEDBROWSER-127The proxy requested authentication (for tunnel establishment). ERR_MANDATORY_PROXY_CONFIGURATION_FAILEDBROWSER-131A mandatory proxy configuration could not be used. ERR_PRECONNECT_MAX_SOCKET_LIMITBROWSER-133We've hit the max socket limit for the socket pool while preconnecting. ERR_SSL_CLIENT_AUTH_PRIVATE_KEY_ACCESS_DENIEDBROWSER-134The permission to use the SSL client certificate's private key was denied. ERR_SSL_CLIENT_AUTH_CERT_NO_PRIVATE_KEYBROWSER-135The SSL client certificate has no private key. ERR_PROXY_CERTIFICATE_INVALIDBROWSER-136The certificate presented by the HTTPS Proxy was invalid. ERR_NETWORK_ACCESS_DENIEDBROWSER-138Permission to access the network was denied. ERR_TEMPORARILY_THROTTLEDBROWSER-139The request throttler module cancelled this request to avoid DDOS. ERR_HTTPS_PROXY_TUNNEL_RESPONSE_REDIRECTBROWSER-140Obsolete, since we now use the catch-all ERR_TUNNEL_CONNECTION_FAILED when a proxy tried to redirect a… ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILEDBROWSER-141We were unable to sign the CertificateVerify data of an SSL client auth handshake with the client… ERR_MSG_TOO_BIGBROWSER-142The message was too large for the transport. ERR_WS_PROTOCOL_ERRORBROWSER-145Websocket protocol error. ERR_ADDRESS_IN_USEBROWSER-147Returned when attempting to bind an address that is already in use. ERR_SSL_HANDSHAKE_NOT_COMPLETEDBROWSER-148Obsolete: ERR_SSL_BAD_PEER_PUBLIC_KEYBROWSER-149Obsolete: NET_ERROR(SSL_HANDSHAKE_NOT_COMPLETED, -148) ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAINBROWSER-150The certificate didn't match the built-in public key pins for the host name. ERR_CLIENT_AUTH_CERT_TYPE_UNSUPPORTEDBROWSER-151Server request for client certificate did not contain any types we support. ERR_SSL_DECRYPT_ERROR_ALERTBROWSER-153An SSL peer sent us a fatal decrypt_error alert. ERR_WS_THROTTLE_QUEUE_TOO_LARGEBROWSER-154There are too many pending WebSocketJob instances, so the new job was not pushed to the queue. ERR_SSL_SERVER_CERT_CHANGEDBROWSER-156The SSL server certificate changed in a renegotiation. ERR_SSL_UNRECOGNIZED_NAME_ALERTBROWSER-159The SSL server sent us a fatal unrecognized_name alert. ERR_SOCKET_SET_RECEIVE_BUFFER_SIZE_ERRORBROWSER-160Failed to set the socket's receive buffer size as requested. ERR_SOCKET_SET_SEND_BUFFER_SIZE_ERRORBROWSER-161Failed to set the socket's send buffer size as requested.