Webview app download error?

Hi Thunkers,
i tried to create a simple webview app (only the webview part no other options) and when i try to download the android app it gives me following error.what should i do to avoid this error.please help.

App Download Error: Command failed: $ANDROID_HOME/build-tools/27.0.3/aapt package -f --no-crunch -I $ANDROID_HOME/platforms/android-27/android.jar -M /usr/src/app/backend/builds/a4cef272-1bc5-47aa-a191-223240d6c6b9/AndroidManifest.xml -S /usr/src/app/backend/builds/a4cef272-1bc5-47aa-a191-223240d6c6b9/resources -m -J /usr/src/app/backend/…/thunkableCompanion/android/app/build/generated/source/r/prod/template -F /usr/src/app/backend/builds/a4cef272-1bc5-47aa-a191-223240d6c6b9/resources.apk -G /usr/src/app/backend/…/thunkableCompanion/android/app/build/intermediates/proguard-rules/prod/template/aapt_rules.txt -D /usr/src/app/backend/…/thunkableCompanion/android/app/build/intermediates/multi-

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