The top icon keps displaying in gray and the loading icon keeps showing.
I tried to uninstall the Creative Claoud app but the following massage appears: 'Unable to shutdown Creative Cloud. Quit creative Cloud and try again'
Kindly follow the below mentioned steps.
If you have any CC 2014 app installed, please open any of them and try to sign in.
Go to help > Sign in
If it still doesn't work, uninstall, https://helpx.adobe.com/creative-suite/kb/cs5-cleaner-tool-installation-problems.html.
Kindly share the results one done.