How to fix the Oracle error TNS-02506: Authentication: no type string?

In this post, you’ll learn more about the Oracle ErrorTNS-02506: Authentication: no type string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-02506: Authentication: no type string

Reason for the Error TNS-02506: Authentication: no type string

Cause: An authentication context structure does not contain a string that describes the authentication service being used.

How to fix the Error TNS-02506: Authentication: no type string ?

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

Action: If it is possible, enable tracing and attempt to reproduce the problem. In any event, contact Oracle Customer Support.