I faced this error. so I added the line below to build.gradle(project) file ,dependency part:
classpath 'com.android.tools.build:gradle:3.6.0'
and I changed distributionUrl in gradle-wrapper.properties file to :
https\://services.gradle.org/distributions/gradle-5.6.4-all.zip
It solved my problem I hope solve yours too.
Update 09/21/2020
Finally, I upgrade all of my plugins and libraries and It works perfectly by gradle-6.6.1-all.zip in gradle-wrapper.properties file and classpath 'com.android.tools.build:gradle:4.0.1' in Gradle project in dependencies section.
Be careful if you use greenDAO or sqlcipher to upgrade correctly