Error when renewing cert: HTTPSConnectionPool(host='acme-v02.api.letsencrypt.org', port=443): Max retries exceeded with url: /directory (Caused by SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:1131)')))

OK, so openssl works within your LAN...
But it fails to things outside your LAN.
Either:

  • the router is doing something to cause that
  • your ISP is doing something to cause that
  • your country/government is doing something to cause that
  • hacker(s) are doing something to cause that

Reboot what you can and retest.

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Turns out it was the router. At some point, for whatever reason, I had paused the raspberry pi's internet connection through the Google Home app. I apologize for wasting your time on this wild goose chase, and thank you for your extensive help. I kind of feel like a total idiot, but I'm leaving this here for someone else who might have done this and forgotten, and gotten crazy cryptic error messages (at least to a relatively untrained eye).

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