ORA-00942: Table or view does not exist

SQL> conn hr /***
SQL> select username, sid, serial #, module, action from v $ session;

Select username, sid, serial #, module, action from v $ session

ORA-00942: Table or view does not exist

Solution:

Sqlplus "sys/*** as sysdba"
SQL> grant select on gv $ session to hr;
Grant select on gv $ session to hr
*
Row 3 has an error:
ORA-02030: only queries from a fixed table/View

SQL> grant select on sys. v _ $ session to hr;

Authorization successful.

Sqlplus "hr /***"
SQL> select username, sid, serial #, module, action from v $ session;

Username sid serial # MODULE ACTION
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1 1
2 1