title: Cannot set the value of read-only property 'classDirectories' for task '...' of type org.gradle.testing.jacoco.tasks.JacocoReport
body: <p>I just updated my Android Studio to 4.0 with a new version of Gradle, and I now have an error on my build.</p>
  <p><code>Cannot set the value of read-only property 'classDirectories' for task ':app:testNameOfMyFlavorDebugUnitTestCoverage' of type org.gradle.testing.jacoco.tasks.JacocoReport.</code></p>
  <p>It's been working fine so far, I don't know what to change to make it work again.</p>