Question: How is it possible that I get this message? It does not make any sense.
I'm using `com.squareup.retrofit2:retrofit:2.9.0`

```
     Caused by: java.lang.IllegalStateException: Expected Android API level 21+ but was 30
    at okhttp3.internal.platform.AndroidPlatform$Companion.buildIfSupported(AndroidPlatform.kt:370)
    at okhttp3.internal.platform.Platform$Companion.findPlatform(Platform.kt:204)
    at okhttp3.internal.platform.Platform$Companion.access$findPlatform(Platform.kt:178)
    2020-09-16 12:37:07.645 6480-6480/lv.ltt.gasogmp.dev_v3 E/AndroidRuntime:     at 
    okhttp3.internal.platform.Platform.<clinit>(Platform.kt:179)

```

Answer: 
Just Add the Dependency `implementation 'com.squareup.okhttp3:okhttp:4.9.2'` 

PS - Check the latest version here before you add the dependency <https://mvnrepository.com/artifact/com.squareup.okhttp3/okhttp>
Add `implementation 'com.squareup.okhttp3:okhttp:4.9.2'` inside `android\app\build.gradle`

```
dependencies {
    ........
    implementation 'com.google.code.gson:gson:2.8.6'
    implementation 'com.android.support:multidex:1.0.3'   
    implementation 'com.squareup.okhttp3:okhttp:4.9.2' 
    ..........
}

```