The file “***.app” couldn’t be opened because you don’t have permission to view it

This can sometimes be because of a corrupted error in your Info.plist file. Try to create a new project with the same name in Xcode and then replaced the your current projects Info.plist with the new one.

This can also occur if the source code you are compiling, isn't part of the target you are compiling for. To check this, select some of the source code in your project, then look to the File Inspector (on the right side, Utilities pane) for Target Membership and check that the source code is part of the target.