RE: support for IE 11.
System Login screen is displayed and get the message
Welcome to Oracle E-Business Suite!
You can personalize the choices available in this page by setting up new favorites using the favorites star icon.
You can bypass this home page when you sign on to Oracle E-Business Suite by selecting a specific start page. Choose Settings (gear icon) from the top of the page, and then choose Preferences. Select the responsibility and Page you want, and apply your changes. The next time you log in, you will see your preferred start page immediately.
Compatibility View Settings
Listed site in Local Intranet Sites
Disabled the option Enable XSS filter.
Site works fine in other browsers, include Edge and Chrome.
This is an instance image of the Oracle Demo of EBS from the market place running on Oracle cloud.
Thanks for your help