ORA-20000: Schema "HR" does not exist or insufficient privileges - oracle

Question

I use Oracle 11g express. I try to install sample database HR. From cmd
sqlplus
system
123456
Error:
Comment created.
Commit complete.
BEGIN dbms_stats.gather_schema_stats( 'HR' , granularity => 'ALL' , cascade => TRUE , block_sample => TRUE ); END;
*
ERROR at line 1:
ORA-20000: Schema "HR" does not exist or insufficient privileges
ORA-06512: at "SYS.DBMS_STATS", line 3701
ORA-06512: at "SYS.DBMS_STATS", line 24470
ORA-06512: at "SYS.DBMS_STATS", line 24435
ORA-06512: at line 1
How I install sample database HR correctly?

Answer 1

Apparently the statement to create the user hr was not executed correctly, and despite that the execution of the hr_main.sql script is not stopped.
This worked for me:
Once as sysdba:
SQL> alter session set "_ORACLE_SCRIPT"=true;
Session altered.
SQL> create user hr identified by hr;
User created.
SQL> drop user hr cascade;
User droped.
SQL> #?/demo/schema/human_resources/hr_main.sql
...
User created.
...

Answer 2

Navigate to the PDB container as SYS user before executing the script
[oracle#af18354c958e /]$ sqlplus sys as sysdba
Enter password: password
Connected to:
Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
SQL> alter session set container = ORCLPDB1
SQL> #hr_main.sql
specify password for HR as parameter 1:
Enter value for 1: hr
specify default tablespeace for HR as parameter 2:
Enter value for 2: users
specify temporary tablespace for HR as parameter 3:
Enter value for 3: temp
specify log path as parameter 4:
Enter value for 4: $ORACLE_HOME/demo/schema/log/

Answer 3

The problem is the line
create user hr identified by 123456a#
Because user is not created, you are getting other errors.
To resolve it do either of below
Remove special character from password. Or use underscores _ in password.
create user hr identified by 123456a
OR
Try enclosing password in double quotes. (I am not able to test it now. But if it doesn't work, try first option. I referred this link)
create user hr identified by "123456a#"