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ERR_TLS_INVALID_PROTOCOL_VERSION

tls invalid protocol version

What does this code mean?

Code ERR_TLS_INVALID_PROTOCOL_VERSION · An issue reported by Node.js.

Official explanation · Original text

Valid TLS protocol versions are 'TLSv1', 'TLSv1.1', or 'TLSv1.2'.

Troubleshooting and diagnostic links

First check that the document's product, version, and environment match your situation.

Source and terms of use

Errors | Node.js v26.13.1 Documentation ↗

Creator: Node.js contributors; Joyent, Inc. and other Node contributors
License: MIT License (Node.js documentation)
Checked on: 2026-11-12

Modifications: English prose extracted; whitespace normalized; Korean context and classified official links added. Python code examples not redistributed.

Source details · Original licenses and notices