Found PRVG-1017 which is related to time synchronization during pre-installation of Oracle RAC database 19c:
[grid@primary01 ~]$ cd $ORACLE_HOME
[grid@primary01 grid]$ ./runcluvfy.sh stage -pre crsinst -n primary01,primary02 -verbose
Verifying Network Time Protocol (NTP) ...FAILED
primary01: PRVG-1017 : NTP configuration file "/etc/chrony.conf" is present on
nodes "primary01" on which NTP daemon or service was not running
PRVG-1017 means that NTP service daemon for cluster time synchronization is not running.
The solution is to install, enable and then start NTP service. In this case, we should enable and start chronyd service daemon in Oracle Linux 7.
[root@primary01 ~]# systemctl enable chronyd
Created symlink from /etc/systemd/system/multi-user.target.wants/chronyd.service to /usr/lib/systemd/system/chronyd.service.
[root@primary01 ~]# systemctl start chronyd