After I updated my project on UE4.18, there were some problems. As soon as I understood the packaging of Gradle, I found that I do not have save jobs in a packed version. Next, I found that the new version defaults to uses-permission android: name = "android.permission.WRITE_EXTERNAL_STORAGE" …

The problem was solved by including “Use ExternalFilesDir for UE4Game files” in the project settings