Unable to update Plesk: The required version ‘3.20.19’ was not found on the server.

Symptoms

• Unable to update Plesk at Tools & Settings > Updates page. It fails with the below error:

  The required version '3.20.19' was not found on the server. This could happen because of configuration error at the installation source. Version is not specified. Error in Version.cpp.

• The following message appears in CLI while executing plesk installer command:

  /var/cache/parallels_installer/parallels_installer_CentOS_7_x86_64_3.20.19: /lib64/libcrypto.so.10: version `OPENSSL_1.0.2' not found (required by /var/cache/parallels_installer/parallels_installer_CentOS_7_x86_64_3.20.19)

Cause

Outdated OpenSSL version.

Resolution

1. Connect to the server via SSH.

2. Update the current OpenSSL version:

   • For RHEL-based systems (CentOS, AlmaLinux, etc.):

     # yum update openssl

   • For Debian-based systems (Debian, Ubuntu):

     # apt update openssl