Hi Raz,
You can check with below command DB is open mode or not.
SQL> select name,open_mode from v$database;
If it is shows read and write after that you can perform which i have mentions above steps.
No need to create PSAPTEMP if is throwing any error add one data file in PSAPTEMP tablespace
Add datafiles to tablespace PSAPTEMP through brtools
Regards,
Gurpal
