Hey Julien,
Yes, i was able to figure it out.. with the help of esri phone support. I had a good version of chrome, except i only had IE8, ArcGIS needs 9 or up. So, download IE11, and make sure you have active scripting enabled if youre using server manager in IE.... Internet Options (Security Tab > Custom Level > Scripting > Active Scripting > Enable). Enable it in chrome as well for good measure