If you are using version 119 or later of the Chrome browser, you might see the following error when trying to configure a connection to services in Oracle Integration:

"Error: Cross-origin resource sharing error: Missing Allow origin header"

The reason for the error is that starting with version 119, the Chrome browser treats cross-domain redirects and CORS differently than earlier versions.

If you encounter the error, navigate to the "Integration Applications" backend and change the Connection Type to "Always use proxy, irrespective of CORS support" to eliminate the CORS issue.