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プロダクションモードでは、サーバは起動に失敗し、次のログを出力し続けます。私はウェブページにアクセスできません。しかし、コードは開発モードで正常に動作します。どのように問題を解決する?要求が見つかりませんScalaでの `Host`ヘッダエラー2.6.7 Akka
2017-11-23T10:04:07+08 [INFO] from play.core.server.AkkaHttpServer [main]
Listening for HTTP on /0:0:0:0:0:0:0:0:9000
2017-11-23T10:04:08+08 [WARN] from akka.actor.ActorSystemImpl [application-akka.actor.default-dispatcher-4]
Illegal request, responding with status '400 Bad Request': Request is
missing required `Host` header: Cannot establish effective URI of request
to `/`, request has a relative URI and is missing a `Host` header;
consider setting `akka.http.server.default-host-header`
2017-11-23T10:04:08+08 [WARN] from akka.actor.ActorSystemImpl [application-akka.actor.default-dispatcher-3]
Illegal request, responding with status '400 Bad Request': Request is
missing required `Host` header: Cannot establish effective URI of request
to `/`, request has a relative URI and is missing a `Host` header;
consider setting `akka.http.server.default-host-header`