Што ето?

[zela2019]

java.net.UnknownHostException: launcher.simpleminecraft.ru
    at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:220)
    at java.base/java.net.Socket.connect(Socket.java:591)
    at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:177)
    at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:474)
    at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:569)
    at java.base/sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
    at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:341)
    at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:362)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1242)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1181)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1075)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1009)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1356)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1331)
    at ru.simplemc.updater.service.http.BaseHttpService.performPostRequest(BaseHttpService.java:51)
    at ru.simplemc.updater.service.http.HttpServiceManager.performPostRequest(HttpServiceManager.java:78)
    at ru.simplemc.updater.service.http.HttpServiceManager.performPostRequest(HttpServiceManager.java:82)
    at ru.simplemc.updater.service.http.HttpServiceManager.performPostRequest(HttpServiceManager.java:82)
    at ru.simplemc.updater.thread.UpdateThread.getCheckUpdatesResponse(UpdateThread.java:84)
    at ru.simplemc.updater.thread.UpdateThread.run(UpdateThread.java:42)

[magic2018]

Переустановить лаунчер надо