An error has occurred that has stopped this transaction from continuing.

The above error may happen when doing the following in Enterprise Portal:

Navigation: Portal Administration -> Branding -> Define Headers or Define Footers (Add / View existing Value)

Add a New Value or Find An existing Value

Set Header ID: TEST1

You will get this message "An error has occurred that has stopped this transaction from continuing."

Reason
This message appears in Enterprise Portal due to 0 rows in PS_INSTALLATION Table. To fix this issue: Insert a row in PS_INSTALLATION table and  restart the appservers.

The SQL I have used is as follows.

INSERT INTO PS_INSTALLATION
VALUES('Y','Y','N','N','USA','USD','OFFIC','N',25,'N','N');

Tested this with Enterprise Portal 8.8 and PeopleTools 8.48.16