I had the same issue as above,
- went to …\NVPACK\android-sdk-windows\tools\
- clicked on android.bat to open it
- unchecked all options listed (it knew i needed ver 9 and 10 still)
- only checked back on the “SDK Platform” for Android 9 and 10
- and checked on “Android SDK Platform-tools” to let it update that too
- install the 3 packages
- Reopened UE4, complied project, and worked just fine.
Let me know if you need a screenshot or two,
Good luck!