Thank you. I apologize to Cocoon. After many tests I realized the problem was with APPODEAL plugin, after I updated their SDK and somehow it gave me black screen. Their support tried to help me and sent other plugins, only one worked (nodex and had to enable multidex, which for my surprise disabled Cocoon splash screen!!) But it made the game lag too much and after trying to select Canvas (instead of Webview) it gave a build error.
I gave on appodeal for now and Im using AdMob directly, which is running smoothly.
I dont understand all these docs saying you must install Cocoon plugin/SDK into Construct 2 and AdMob Cocoon specific SDK. I have not added Cocoon to my C2 project and its building fine, I just export as cordova, add the plugins on cocoon and its good to go…
Theres a lot of confusing and duplicated information that mislead users.
Phone Gap Buld (Cloud Service) is also a good way to go if you are having to many trouble with Cocoon (sorry for mentioning it here, but its for the sake and sanity for the amateur users like me)