well if your making map's of your own for the Scenarios there is an drop down box where you can play your own custom Scenarios and that should be in the campaing menu.

if your downloading other people's Scenarios then it will should work for the campaing if not then it might only just work for the sandbox mode only but i do not know like but all i am doing is guessing like hope this Help's you!

I'm creating a few cities, yesterday I tryied to make a scenario with one of my cities but it seems it doesn't work at all. I can't even choose a city or insert its name, it says : ERROR Invalide Name File

Yes, Ricky, I reported this bug ages ago: http://forum.paradoxplaza.com/forum/showthread.php?702649-BUG-Cannot-Create-New-Scenario

well, my new city is almost finished, so I would like to make a scenario on it...

Reply to my bug report on the official forums with your DxDiag and output_log.txt, they might fix it sooner then, but who knows.

tryed the scenarios 21 hour ago, it looks like it was working... Finish and publish a new city and gonna see about those scenario stuff ! :-)

well that's the only thing iv still keep on getting Errors about the cloud thing!