12571 Error generally appears when creating a database.
Solution:
Open ORA92 / NETWORK / Admin / SQLNET.ORA
Change SQLNET.AUTHENTICATION_SERVICES = (NTS) to:
SQLNET.AUThentication_Services = (NONE)
This issue can be successfully solved.
This problem has caused a lot of reasons. It is estimated to be due to the cause of the domain (names.default_domain) or network firewall.
What is specifically didn't figure out now, but the solution is to be done by me.
