OA was upgraded to version 7.0 and new UI host was added where subsequently the brands were moved to.
Since then the logos and icons do not display in CP if accessed through migrated brands.
Software issue #APS-43268. The fix is planned to be included in one of the future product updates.
In fact icons and logos were moved to the destination node but to the wrong location.
To fix the situation the pictures can be copied manually to the correct folder:
cp -n /usr/local/pem/wildfly-10.1.0.Final/ext/pem/images/applications/* /usr/local/pem/wildfly-10.1.0.Final/ext/puiStatic/images/applications/ cp -n /usr/local/pem/wildfly-10.1.0.Final/ext/puiStatic/pem/images/upload/brand* /usr/local/pem/wildfly-10.1.0.Final/ext/pem/images/upload/