Unable to install or update Plesk: “version `OPENSSL_1.0.2′ not found” or “version `OPENSSL_1_1_1′ not found”

Symptoms

• Plesk installation fails:

  /var/cache/parallels_installer/installer: /lib64/libcrypto.so.10: version `OPENSSL_1.0.2' not found (required by /var/cache/parallels_installer/installer)

  ---

  /var/cache/parallels_installer/parallels_installer_Ubuntu_18.04_x86_64_3.23.20: /usr/lib/x86_64-linux-gnu/libssl.so.1.1: version `OPENSSL_1_1_1' not found

• The OpenSSL version installed on the server is lower than the version mentioned in the error, for example:

  # openssl version
  OpenSSL 1.0.1e-fips

Cause

The OpenSSL package is outdated.

Resolution

1. Connect to the server via SSH.

2. Update the openssl package:

   • on CentOS/RHEL-based distributions:

     # yum update openssl

   • on Debian/Ubuntu-based distributions:

     # apt update && apt install openssl

   Note: It is generally recommended to update all system packages prior to installing Plesk.