Failed to Repackage Resources Error Unity 5.6.0f3?

Here’s the exact error I’m getting trying to build my game for Android Kitkat. I have the corresponding SDK installed (sdk level 19) but I’m still getting this error. Can anyone point me to how to fix this or even just figure out what’s going wrong?

CommandInvokationFailure: Failed to re-package resources.
C:\Users\Natasha\AppData\Local\Android\sdk\build-tools\26.0.2\aapt.exe package --auto-add-overlay -v -f -m -J “gen” -M “AndroidManifest.xml” -S “res” -I “C:/Users/Natasha/AppData/Local/Android/sdk\platforms\android-19\android.jar” -F bin/resources.ap_

stderr[
res\values-v21\styles.xml:3: error: Error retrieving parent for item: No resource found that matches the given name ‘android:Theme.Material.Light.NoActionBar.Fullscreen’.

]
stdout[
Configurations:
(default)
v14
v21
ldpi-v4
mdpi-v4
hdpi-v4
xhdpi-v4
xxhdpi-v4
xxxhdpi-v4

Files:
drawable\app_icon.png
Src: (ldpi-v4) res\drawable-ldpi\app_icon.png
Src: (mdpi-v4) res\drawable-mdpi\app_icon.png
Src: (hdpi-v4) res\drawable-hdpi\app_icon.png
Src: (xhdpi-v4) res\drawable-xhdpi\app_icon.png
Src: (xxhdpi-v4) res\drawable-xxhdpi\app_icon.png
Src: (xxxhdpi-v4) res\drawable-xxxhdpi\app_icon.png
values\strings.xml
Src: () res\values\strings.xml
values\styles.xml
Src: () res\values\styles.xml
Src: (v14) res\values-v14\styles.xml
Src: (v21) res\values-v21\styles.xml
AndroidManifest.xml
Src: () AndroidManifest.xml

Resource Dirs:
Type drawable
drawable\app_icon.png
Src: (ldpi-v4) res\drawable-ldpi\app_icon.png
Src: (mdpi-v4) res\drawable-mdpi\app_icon.png
Src: (hdpi-v4) res\drawable-hdpi\app_icon.png
Src: (xhdpi-v4) res\drawable-xhdpi\app_icon.png
Src: (xxhdpi-v4) res\drawable-xxhdpi\app_icon.png
Src: (xxxhdpi-v4) res\drawable-xxxhdpi\app_icon.png
Type values
values\strings.xml
Src: () res\values\strings.xml
values\styles.xml
Src: () res\values\styles.xml
Src: (v14) res\values-v14\styles.xml
Src: (v21) res\values-v21\styles.xml
Including resources from package: C:\Users\Natasha\AppData\Local\Android\sdk\platforms\android-19\android.jar
applyFileOverlay for drawable
applyFileOverlay for layout
applyFileOverlay for anim
applyFileOverlay for animator
applyFileOverlay for interpolator
applyFileOverlay for transition
applyFileOverlay for xml
applyFileOverlay for raw
applyFileOverlay for color
applyFileOverlay for menu
applyFileOverlay for font
applyFileOverlay for mipmap
Processing image: res\drawable-ldpi\app_icon.png
Processing image: res\drawable-mdpi\app_icon.png
Processing image: res\drawable-hdpi\app_icon.png
(processed image res\drawable-ldpi\app_icon.png: 97% size of source)
Processing image: res\drawable-xhdpi\app_icon.png
(processed image res\drawable-mdpi\app_icon.png: 99% size of source)
Processing image: res\drawable-xxhdpi\app_icon.png
(processed image res\drawable-hdpi\app_icon.png: 99% size of source)
Processing image: res\drawable-xxxhdpi\app_icon.png
(processed image res\drawable-xhdpi\app_icon.png: 99% size of source)
(processed image res\drawable-xxhdpi\app_icon.png: 97% size of source)
(processed image res\drawable-xxxhdpi\app_icon.png: 97% size of source)
(new resource id app_icon from ldpi-v4\drawable\app_icon.png #generated)
(new resource id app_icon from mdpi-v4\drawable\app_icon.png #generated)
(new resource id app_icon from hdpi-v4\drawable\app_icon.png #generated)
(new resource id app_icon from xhdpi-v4\drawable\app_icon.png #generated)
(new resource id app_icon from xxhdpi-v4\drawable\app_icon.png #generated)
(new resource id app_icon from xxxhdpi-v4\drawable\app_icon.png #generated)
]
exit code: 1
UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
UnityEditor.Android.PostProcessor.Tasks.TasksCommon.Exec (System.String command, System.String args, System.String workingdir, System.String errorMsg, Int32 retriesOnFailure)
UnityEditor.HostView:OnGUI()

just downgrade your sdk version