How to Solve the Error "Refused to display 'https://...' in a frame because 'X-Frame-Options' is set to 'DENY'." into iConnect and InfoCenter After Applying the Oracle Knowledge 8.6.1 RUP?

(Doc ID 2220939.1)

Last updated on JUNE 29, 2017

Applies to:

Oracle Knowledge - Version 8.6 and later
Information in this document applies to any platform.

Symptoms

Recently upgraded from Oracle Knowledge 8.6 to Oracle Knowledge 8.6.1 and when accessing iConnect and InfoCenter, the applications don't load because the error: 

"Refused to display 'https://...' in a frame because 'X-Frame-Options' is set to 'DENY'."

 iframe is totally dependent on iConnect.

STEPS
-----------------------
The issue can be reproduced at will with the following steps:
1. Applied the Oracle Knowledge 8.6.1 RUP.
2. Open the InfoCenter and iConnect.
3. The applications (iConnect, InfoCenter) don't load.

Changes

 Applied the Oracle Knowledge 8.6.1 RUP.

Cause

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