remove .protocols(listOf(Protocol.HTTP_1_1))

app/src/main/java/io/legado/app/help/http/HttpHelper.kt

@@ -1,7 +1,10 @@
 package io.legado.app.help.http
 
 import kotlinx.coroutines.suspendCancellableCoroutine
-import okhttp3.*
+import okhttp3.ConnectionSpec
+import okhttp3.Credentials
+import okhttp3.Interceptor
+import okhttp3.OkHttpClient
 import java.net.InetSocketAddress
 import java.net.Proxy
 import java.util.concurrent.ConcurrentHashMap
@@ -33,7 +36,6 @@ object HttpHelper {
             .connectionSpecs(specs)
             .followRedirects(true)
             .followSslRedirects(true)
-            .protocols(listOf(Protocol.HTTP_1_1))
             .addInterceptor(getHeaderInterceptor())
 
         builder.build()