Android Studio版本3.1.3更新问题

Question

今天我更新了Android 3.1.3版，但更新后出现了很多问题，下面是Android Studio中显示的问题。

Could not find com.android.tools.build:gradle:4.4.0.
Searched in the following locations:
    https://maven.fabric.io/public/com/android/tools/build/gradle/4.4.0/gradle-4.4.0.pom
    https://maven.fabric.io/public/com/android/tools/build/gradle/4.4.0/gradle-4.4.0.jar
    https://jcenter.bintray.com/com/android/tools/build/gradle/4.4.0/gradle-4.4.0.pom
    https://jcenter.bintray.com/com/android/tools/build/gradle/4.4.0/gradle-4.4.0.jar
    https://maven.google.com/com/android/tools/build/gradle/4.4.0/gradle-4.4.0.pom
    https://maven.google.com/com/android/tools/build/gradle/4.4.0/gradle-4.4.0.jar
Required by:
    project :
Open File