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Unable to upload a .pem file: Unable to set the private key: Probably, the private key format is invalid.

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Vincent Lauton
Updated
kb: technical

Applicable to:

  • Plesk for Linux

Symptoms

Unable to upload an SSL certificate issued by CA, it fails with the following error message:

PLESK_ERROR: Error: Unable to set the private key: Probably, the private key format is invalid.

Cause

None of the certificate files provided by CA (.PEM and .CRT files) contain the private key

Resolution

  1. Contact CA to request a certificate including the private key section, it should look as follows:

    CONFIG_TEXT: -----BEGIN PRIVATE KEY-----
    ...
    -----END PRIVATE KEY-----

  2. Add the complete certificate parts to Plesk

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