Debug My First Android App (Android Studio)

I have had a go at making an android camera app and it has stopped working. I just need this exception fixed. I can provide the code and I expect it is something basic I am missing. Please could someone help fix it as I do not have much free time. The app folder format is from Android Studio but it is a simple app with just a manifest and two .java files. Debug output: 25338-25338/[login to view URL] E/AndroidRuntime: FATAL EXCEPTION: main [login to view URL]: Unable to start activity ComponentInfo{[login to view URL]}: [login to view URL] at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) .. followed by: W/ActivityManager: Permission denied: checkComponentPermission()