Build faild with gradle : resource android:attr/fontStyle not found

i tried to build an empty level without gradle and i’ve got many failures, so i decided to go up and build with gradle
it also resaulted in many errors. i’ve managed to fix almost 11 errors with gradle. please help me to fix this error, details in the log file attatched.
i use ue4.21 release, android sdk tools/build tools/ndk are all updated
link text