ERROR: Android Source Generator: [project] AndroidManifest.xml file not found

you must open Project Structure modified something.

example: Project Structure > Facets ,you can see this is: enter image description here

delete ".idea", like this enter image description here

ok, IDE there find AndroidManifest.xml


I know the problem in IDEA because you create a new project with Java configuration (not android, but with android sdk dependency)

File > New Project > Java (Java Module) > Project SDK Android 4.X

Here is the solution :

File > New Project > Android (Application Module)