Finally able to resolve the issue by 1. Deleting ...

# android

[ravikumar]

Finally able to resolve the issue by
1. Deleting root project build folder
2. And explicitly defined

buildscript {
		ext.kotlin_version = "1.1.1"
		...
	}

Previously(1.1.0) I'd used to run with following config without
kotlin_version defined explicitly. Now in 1.1.1 it throws error.

apply from: "config/dependencies.gradle"
	apply plugin: "kotlin"

	buildscript {	 
	  repositories {
		jcenter()
	  }

	  dependencies {
		apply from: "config/dependencies.gradle"
		classpath compileDependencies.gradle
		classpath compileDependencies.kotlinPlugin
		classpath compileDependencies.realmPlugin
	  }
	}