Why does it show Invalid color value ?attr/textcolor Android Studio

Question

I'm trying to build a Generated signed bundle in Android Studio but it doesn't work. It shows this error message.

270 exceptions were raised by workers: A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$RunnableWrapperWorkAction A failure occurred while executing (and much longer)

Invalid color value ?attr/textcolor

This is my code below

 <vector xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24"
    android:viewportHeight="24">
  <path
      android:pathData="M18,6L6,18"
      android:strokeLineJoin="round"
      android:strokeWidth="2.5"
      android:fillColor="#00000000"
      android:strokeColor="?attr/textcolor"
      tools:ignore="VectorRaster"
      android:strokeLineCap="round"/>
  <path
      android:pathData="M6,6L18,18"
      tools:ignore="VectorRaster"
      android:strokeLineJoin="round"
      android:strokeWidth="2.5"
      android:fillColor="#00000000"
      android:strokeColor="?attr/textcolor"
      android:strokeLineCap="round"/>
</vector>