Having a lot of errors while trying to create new porject in Android Studio 3.5.3 - android-studio

Question

I want to create a project in Android Studio 3.5.3 by using Kotlin, but I've got a lot of errors.
the first error is:
Could not find androidx.appcompat:appcompat:1.1.0.
Required by:
project :app
After a lot of searching I added maven to repositories:
allprojects {
repositories {
google()
jcenter()
maven { url 'https://maven.google.com' }
}
}
now I get these errors:
ERROR: Failed to resolve: androidx.core:core-ktx:1.2.0
Show in Project Structure dialog
Affected Modules: app
ERROR: Failed to resolve: constraintlayout-solver
Affected Modules: app
ERROR: Failed to resolve: androidx.test.espresso:espresso-core:3.2.0
Show in Project Structure dialog
Affected Modules: app
I don't know what I should do to eliminate these errors. I've tried many ways but I couldn't solve these errors.
this is my build.gradle file:
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
android {
compileSdkVersion 29
buildToolsVersion "29.0.2"
defaultConfig {
applicationId "com.example.myapplication"
minSdkVersion 17
targetSdkVersion 29
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.core:core-ktx:1.2.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}