Kernel (4.XX.X-XXX.XX.XX.el8_X.x86_64) is not supported.
This issue has been resolved by the below patch.
https://supportbackupexec.cloud.com/support-home/home
Installation steps are as follows.
1. Please download VSRL_21_0_3_Linux_English_InstallOnly.tar.gz from the above URL.
2. Run "tar xvf VSRL_21_0_3_Linux_English_InstallOnly.tar.gz" to extract the installer.
3. Move to the extracted directory, and run "./Veritas_System_Recovery.bin".
4. Complete according to the installation wizard.
Installation of System Recovery for Linux version 21.x (21, 21.1, 21.2 and 21.3) fails to install on the Red Hat Enterprise Linux operating system (RHEL 8.x) that has been updated with the kernel patch.