To quickly check, you can check the log in the windows system and see what is the URL that is printed for this[Tue Apr 12 16:35:34 2016] [I] [9847] "GET /bin/wcmcommand?cmd=open&path=%252Fcontent%252Fcountry-sites%252Fu%252Fen&_charset_=utf-8" 404 5336 9ms

I think, its the problem with UTF-8 charset with the URL. May be in RedHat, it is not encoding the URL with UTF-8 and hence it is not able to resolve the URL.

It looks like an issue with IE. See if this could be the problemhttps://helpx.adobe.com/coldfusion/kb/undefined-form-variables-internet-explorer.html

Have you imported the class for customappPagePropertiesPresenter() ??Check if the Name of the class is correct (Usually class name begins with caps)

Check if you have allowed the filters for /bin/* in your dispatcher

Basically, a property or an attribute name which holds the user name/id at SAML is what you have to mention.

'Page Reference' just lists all the links which refers to the current page URL.Ex: if you goto '/content/geometrixx-outdoors/en.html' and check on page reference it lists quite a few content or pages in which the reference for that page is made (means mentioned '/content/geometrixx-outdoors/en.html'...

9A0-382 is for AEM 5.6 / 5..6.1 - This is of older version which may not be preferred now as 6.x is all over !9A0-384 is for AEM 6.x - This is currently in revision state

Have you set up sticky connections ??If you are managing sessions between 2 pub instance with 1 web server, you need to configure the sticky connection in the dispatcher

Are you referring to the column control components ?