Project's root build.gradle file

build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    ext {
        kotlin_version = '1.4.21'
    }
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath "com.android.tools.build:gradle:4.1.1"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.4.10"
        classpath 'com.google.gms:google-services:4.3.4'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        maven { url 'https://jitpack.io' }
        jcenter()
        // CometChat Pro dependency                         <--------------
        maven {
            url "https://dl.bintray.com/cometchat/pro"
        }
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

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