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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 December 09, 2024 15:00

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

Connect to the server via SSH
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

Disable Sectigo SSL extension at Extensions > My Extensions.
Regenerate web-server configuration:

# plesk repair web -y

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