empty activity in android studio java code

Which is compatible, but will actually be displayed with another more specific version of the layout. ,, , Left To Right, sw384dp, w384dp, h640dp, Normal Screen, Short screen aspect ratio, Not Round screen, Portrait Orientation, Normal, Day time, X-High Density, Finger-based touchscreen, Soft keyboard, No keyboard, Hidden navigation, No navigation, Screen resolution 1280x768, API Level 25 02:26:44,053 WARN - rendering.ConfigurationMatcher - 'default' is not a best match for any device/locale combination for file://X:/ud851-Exercises-student/Lesson06-Visualizer-Preferences/T06.01-Exercise-SetupTheActivity/app/src/main/AndroidManifest.xml. IDE adds over 2000 lines off error message to log file

I got all latest tools from stable channel. It happens only with projects from this repo, no problems while creating new activity's in my projects. TODO 1 create new SettingsActivity, Android Studio reports error when I click finish button on new activity window, new Activity Dialog not closing (I can move it but not close it).

Empty activity in android studio java code