Cannot start Postgresql 12 after pg_basebackup (replication)

I have two DB servers and I am trying to make a Master-Slave replication for my PostgreSQL with TimescaleDB extension.

I went through this process:

1. [Both] Install PostgreSQL 12 on CentOS 7.

2. [Both] Initialize DB and install TimescaleDB. (followed official website tutorial)

3. [Both] Do all the firewall-cmd, postgresql.conf, and pg_hba.conf works.

4. [Master] Create initial database.

5. [Slave] stop PostgreSQL, remove everything in /var/lib/pgsql/12/data, and pg_basebackup from Master.

   (Command I used: pg_basebackup -h [MASTER_DB_IP] -D /var/lib/pgsql/12/data -U [REP_USER] -vP -W)

6. [Slave] set hot_standby = on and create recovery.conf

7. [Slave] start PostgreSQL to check replication works.

8. [Slave] This error occurs and cannot start PostgreSQL.

-- Subject: Unit postgresql-12.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit postgresql-12.service has begun starting up.
Dec 02 17:53:40 localhost.localdomain postmaster[10439]: 2020-12-02 17:53:40.116 KST [10439] LOG:  starting PostgreSQL 12.5 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623 (Red
Dec 02 17:53:40 localhost.localdomain postmaster[10439]: 2020-12-02 17:53:40.116 KST [10439] LOG:  listening on IPv4 address "0.0.0.0", port 5432
Dec 02 17:53:40 localhost.localdomain postmaster[10439]: 2020-12-02 17:53:40.116 KST [10439] LOG:  listening on IPv6 address "::", port 5432
Dec 02 17:53:40 localhost.localdomain postmaster[10439]: 2020-12-02 17:53:40.122 KST [10439] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
Dec 02 17:53:40 localhost.localdomain postmaster[10439]: 2020-12-02 17:53:40.130 KST [10439] LOG:  listening on Unix socket "/tmp/.s.PGSQL.5432"
Dec 02 17:53:40 localhost.localdomain postmaster[10439]: 2020-12-02 17:53:40.142 KST [10439] LOG:  redirecting log output to logging collector process
Dec 02 17:53:40 localhost.localdomain postmaster[10439]: 2020-12-02 17:53:40.142 KST [10439] HINT:  Future log output will appear in directory "log".
Dec 02 17:53:42 localhost.localdomain systemd[1]: postgresql-12.service: main process exited, code=exited, status=1/FAILURE
Dec 02 17:53:42 localhost.localdomain systemd[1]: Failed to start PostgreSQL 12 database server.

As far as I know, this is the last step for replication. But PostgreSQL is not starting after all configuration.

Please ask me any detailed questions.

Thank you in advance.