Acabei de baixar o código do projeto, e ao executar, gera essa exceção:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: br.com.alura.technews, PID: 23326
java.lang.ExceptionInInitializerError
at okhttp3.internal.platform.Platform.get(Platform.java:85)
at okhttp3.OkHttpClient.newSslSocketFactory(OkHttpClient.java:296)
at okhttp3.OkHttpClient.<init>(OkHttpClient.java:262)
at okhttp3.OkHttpClient$Builder.build(OkHttpClient.java:1054)
at br.com.alura.technews.retrofit.AppRetrofit$client$2.invoke(AppRetrofit.kt:18)
at br.com.alura.technews.retrofit.AppRetrofit$client$2.invoke(AppRetrofit.kt:11)
at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:74)
at br.com.alura.technews.retrofit.AppRetrofit.getClient(Unknown Source:7)
at br.com.alura.technews.retrofit.AppRetrofit.access$getClient$p(AppRetrofit.kt:11)
at br.com.alura.technews.retrofit.AppRetrofit$retrofit$2.invoke(AppRetrofit.kt:24)
at br.com.alura.technews.retrofit.AppRetrofit$retrofit$2.invoke(AppRetrofit.kt:11)
at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:74)
at br.com.alura.technews.retrofit.AppRetrofit.getRetrofit(Unknown Source:7)
at br.com.alura.technews.retrofit.AppRetrofit.access$getRetrofit$p(AppRetrofit.kt:11)
at br.com.alura.technews.retrofit.AppRetrofit$noticiaService$2.invoke(AppRetrofit.kt:28)
at br.com.alura.technews.retrofit.AppRetrofit$noticiaService$2.invoke(AppRetrofit.kt:11)
at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:74)
at br.com.alura.technews.retrofit.AppRetrofit.getNoticiaService(Unknown Source:7)
at br.com.alura.technews.retrofit.webclient.NoticiaWebClient.<init>(NoticiaWebClient.kt:13)
at br.com.alura.technews.repository.NoticiaRepository.<init>(NoticiaRepository.kt:11)
at br.com.alura.technews.ui.activity.ListaNoticiasActivity$repository$2.invoke(ListaNoticiasActivity.kt:22)
at br.com.alura.technews.ui.activity.ListaNoticiasActivity$repository$2.invoke(ListaNoticiasActivity.kt:19)
at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:74)
at br.com.alura.technews.ui.activity.ListaNoticiasActivity.getRepository(Unknown Source:7)
at br.com.alura.technews.ui.activity.ListaNoticiasActivity.buscaNoticias(ListaNoticiasActivity.kt:59)
at br.com.alura.technews.ui.activity.ListaNoticiasActivity.onResume(ListaNoticiasActivity.kt:38)
at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1456)
at android.app.Activity.performResume(Activity.java:8129)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:4434)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:4476)
at android.app.servertransaction.ResumeActivityItem.execute(ResumeActivityItem.java:52)
at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:176)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: java.lang.IllegalStateException: Expected Android API level 21+ but was 30
at okhttp3.internal.platform.AndroidPlatform.buildIfSupported(AndroidPlatform.java:238)
at okhttp3.internal.platform.Platform.findPlatform(Platform.java:202)
at okhttp3.internal.platform.Platform.<clinit>(Platform.java:79)
at okhttp3.internal.platform.Platform.get(Platform.java:85)
at okhttp3.OkHttpClient.newSslSocketFactory(OkHttpClient.java:296)
at okhttp3.OkHttpClient.<init>(OkHttpClient.java:262)
at okhttp3.OkHttpClient$Builder.build(OkHttpClient.java:1054)
at br.com.alura.technews.retrofit.AppRetrofit$client$2.invoke(AppRetrofit.kt:18)
at br.com.alura.technews.retrofit.AppRetrofit$client$2.invoke(AppRetrofit.kt:11)
at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:74)
at br.com.alura.technews.retrofit.AppRetrofit.getClient(Unknown Source:7)
at br.com.alura.technews.retrofit.AppRetrofit.access$getClient$p(AppRetrofit.kt:11)
at br.com.alura.technews.retrofit.AppRetrofit$retrofit$2.invoke(AppRetrofit.kt:24)
...
