How to fix the Oracle error TNS-12690: Server Authentication failed, login cancelled?

In this post, you’ll learn more about the Oracle ErrorTNS-12690: Server Authentication failed, login cancelled with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-12690: Server Authentication failed, login cancelled

Reason for the Error TNS-12690: Server Authentication failed, login cancelled

Cause: Server Authentication is required, but the server’s credentials were found invalid by the client.

How to fix the Error TNS-12690: Server Authentication failed, login cancelled ?

You can fix this error in Oracle by following the below steps

Action: Make sure that the server has a valid set of credentials. Refer to your authentication adapter specific documentation on how to do this.