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3rd party certificate cannot be issued on a Plesk server: /.well-known/pki-validation/file.txt cannot be found

Vincent Lauton
Updated
kb: technical

Symptoms

  • When issuing a 3rd party certificate, error 404 is returned mentioning /.well-known/pki-validation/file.txt

Cause

Common challenge directory is enabled

Resolution

If using Sectigo to issue certificates

  1. Connect to the server via SSH

  2. Disable the common challenge directory support using the command:

    # plesk ext sslit --common-challenge-dir -disable

    Note: It is recommended to always keep common challenge directory support enabled.

If not using Sectigo

  1. Disable Sectigo SSL extension at Extensions > My Extensions.

  2. Regenerate web-server configuration:

    # plesk repair web -y

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