Could not find firebase-database-19.6.0.aar - firebase

Question

I'm trying to install the firebase database for real time database in my project but im facing an exception every time I try to run.
here's the exception I get:
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:mergeDebugAssets'.
> Could not resolve all files for configuration ':app:debugRuntimeClasspath'.
> Could not find firebase-database-19.6.0.aar (com.google.firebase:firebase-database:19.6.0).
Searched in the following locations:
https://dl.google.com/dl/android/maven2/com/google/firebase/firebase-database/19.6.0/firebase-database-19.6.0.aar
and here's the firebase database version along with the firebase core version in my pubspec:
firebase_core: ^0.7.0
firebase_database: ^6.0.0
and here's my android/build.gradle file:
buildscript {
ext.kotlin_version = '1.3.50'
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:4.1.2'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
classpath 'com.google.gms:google-services:4.3.8'
}
}
allprojects {
repositories {
google()
jcenter()
}
}
rootProject.buildDir = '../build'
subprojects {
project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
project.evaluationDependsOn(':app')
}
task clean(type: Delete) {
delete rootProject.buildDir
}
and these are my dependencies in my app/build.gradle:
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'com.android.support:multidex:1.0.3'
implementation platform('com.google.firebase:firebase-bom:26.0.0')
implementation 'com.google.firebase:firebase-analytics'
implementation 'com.google.firebase:firebase-messaging'
}
I've tried upgrading the gradle version along with the google service version to no avail I tried (flutter clean, deleting the project and coping everything to a new project) I've also tried installing this package in my other projects and it worked fine but it seems the issue is from something else in this project.

Answer 1

The problem was that the gradle version in the gradle/wrapper file was new and doesn't have this file (firebase-database-19.6.0.aar).
So this is what it was:
distributionUrl=https\://services.gradle.org/distributions/gradle-6.6.1-all.zip
and this is it now:
distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip