Gradle error: resource android:attr/fontVariationSettings not found - ionic-framework

Question

I removed and re-added the platform for clearing cache, Now I am getting the following error.
My ionic info:
Ionic:
Ionic CLI : 5.0.2 (C:\Users\AH-KHAN\AppData\Roaming\npm\node_modules\ionic)
Ionic Framework : #ionic/angular 4.6.2
#angular-devkit/build-angular : 0.13.8
#angular-devkit/schematics : 7.3.8
#angular/cli : 7.3.8
#ionic/angular-toolkit : 1.5.1
Cordova:
Cordova CLI : 8.1.2 (cordova-lib#8.1.1)
Cordova Platforms : android 7.1.4
Cordova Plugins : not available
Utility:
cordova-res : 0.6.0
native-run : 0.2.5
System:
NodeJS : v10.15.0 (C:\Program Files\nodejs\node.exe)
npm : 6.4.1
OS : Windows 8.1
I already tried:
Changing com.android.support:support-v4:27+
Adding gradle release plugin
Cleaning and Rebuilding
Add another platform android version
Adding app_id and app_name in strings.xml
Execution failed for task ':app:processDebugResources'.
> Failed to execute aapt
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more l
og output.
* Get more help at https://help.gradle.org
BUILD FAILED in 10s
cmd: Command failed with exit code 1 Error output:
C:\Users\AH-KHAN\.gradle\caches\transforms-1\files-1.1\appcompat-v7-27.1.1.aar\5ea1ced35ab01cfb796d6
0df5a71d20d\res\values\values.xml:251:5-69: AAPT: error: resource android:attr/fontVariationSettings
not found.
C:\Users\AH-KHAN\.gradle\caches\transforms-1\files-1.1\appcompat-v7-27.1.1.aar\5ea1ced35ab01cfb796d6
0df5a71d20d\res\values\values.xml:251:5-69: AAPT: error: resource android:attr/ttcIndex not found.
C:\Users\AH-KHAN\Desktop\bawar\platforms\android\app\build\intermediates\incremental\mergeDebugResou
rces\merged.dir\values\values.xml:265: error: resource android:attr/fontVariationSettings not found.
C:\Users\AH-KHAN\Desktop\bawar\platforms\android\app\build\intermediates\incremental\mergeDebugResou
rces\merged.dir\values\values.xml:265: error: resource android:attr/ttcIndex not found.
error: failed linking references.
Failed to execute aapt
com.android.ide.common.process.ProcessException: Failed to execute aapt
at com.android.builder.core.AndroidBuilder.processResources(AndroidBuilder.java:796)
at com.android.build.gradle.tasks.ProcessAndroidResources.invokeAaptForSplit(ProcessAndroidR
esources.java:551)
at com.android.build.gradle.tasks.ProcessAndroidResources.doFullTaskAction(ProcessAndroidRes
ources.java:285)
at com.android.build.gradle.internal.tasks.IncrementalTask.taskAction(IncrementalTask.java:1
09)
at sun.reflect.GeneratedMethodAccessor414.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$IncrementalTaskActi
on.doExecute(DefaultTaskClassInfoStore.java:173)
at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.
execute(DefaultTaskClassInfoStore.java:134)
at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.
execute(DefaultTaskClassInfoStore.java:121)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTa
skExecuter.java:122)
at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.e
xecute(DefaultBuildOperationExecutor.java:336)
at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.e
xecute(DefaultBuildOperationExecutor.java:328)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationE
xecutor.java:197)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecu
tor.java:107)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteA
ctionsTaskExecuter.java:111)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(Execute
ActionsTaskExecuter.java:92)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActions
TaskExecuter.java:70)
at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTask
Executer.java:63)
at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(Res
olveTaskOutputCachingStateExecuter.java:54)
at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExec
uter.java:58)
at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmpt
ySourceFilesTaskExecuter.java:88)
at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(Reso
lveTaskArtifactStateTaskExecuter.java:52)
at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWit
hNoActionsExecuter.java:52)
at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExec
uter.java:54)
at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMo
stOnceTaskExecuter.java:43)
at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchException
TaskExecuter.java:34)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker$1.run(Defau
ltTaskGraphExecuter.java:248)
at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.e
xecute(DefaultBuildOperationExecutor.java:336)
at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.e
xecute(DefaultBuildOperationExecutor.java:328)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationE
xecutor.java:197)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecu
tor.java:107)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(Def
aultTaskGraphExecuter.java:241)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(Def
aultTaskGraphExecuter.java:230)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.processTask(Def
aultTaskPlanExecutor.java:124)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.access$200(Defa
ultTaskPlanExecutor.java:80)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(Defau
ltTaskPlanExecutor.java:105)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(Defau
ltTaskPlanExecutor.java:99)
at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.
java:625)
at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask(DefaultTaskExecut
ionPlan.java:580)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.run(DefaultTask
PlanExecutor.java:99)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPo
licy.java:63)
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryI
mpl.java:55)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: com.and
roid.tools.aapt2.Aapt2Exception: AAPT2 error: check logs for details
at com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:503)
at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:482)
at com.google.common.util.concurrent.AbstractFuture$TrustedFuture.get(AbstractFuture.java:79
)
at com.android.builder.core.AndroidBuilder.processResources(AndroidBuilder.java:794)
... 47 more
Caused by: java.util.concurrent.ExecutionException: com.android.tools.aapt2.Aapt2Exception: AAPT2 er
ror: check logs for details
at com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:503)
at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:462)
at com.google.common.util.concurrent.AbstractFuture$TrustedFuture.get(AbstractFuture.java:79
)
at com.android.builder.internal.aapt.v2.QueueableAapt2.lambda$makeValidatedPackage$1(Queueab
leAapt2.java:179)
at com.android.builder.internal.aapt.v2.QueueableAapt2$$Lambda$444/1426803296.run(Unknown So
urce)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
... 1 more
Caused by: com.android.tools.aapt2.Aapt2Exception: AAPT2 error: check logs for details
at com.android.builder.png.AaptProcess$NotifierProcessOutput.handleOutput(AaptProcess.java:4
63)
at com.android.builder.png.AaptProcess$NotifierProcessOutput.err(AaptProcess.java:415)
at com.android.builder.png.AaptProcess$ProcessOutputFacade.err(AaptProcess.java:332)
at com.android.utils.GrabProcessOutput$1.run(GrabProcessOutput.java:104)
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:processDebugResources'.
> Failed to execute aapt
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more l
og output.
* Get more help at https://help.gradle.org
BUILD FAILED in 10s
[ERROR] An error occurred while running subprocess cordova.
cordova.cmd build android exited with exit code 1.
Re-running this command with the --verbose flag may provide more information.