Workaround to add Customized Header Image
This is applicable only 110XX builds (till 11021).
In 11021 users are unable to change the logo of the header image due to the Issue ID - 2538.
Below mentioned is the workaround to add Customized Header Image.
-> In the application path \ webapps\ROOT\WEB-INF\security you need to replace the .xml file attached
-> Restart the application.
-> After restarting the Instance try to add the header image. (check it in incognito browser)