java.lang.Throwable
        at kcauldron.KLog.log(KLog.java:30) [KLog.class:1.7.10-R0.1-SNAPSHOT]
        at kcauldron.KLog.warning(KLog.java:41) [KLog.class:1.7.10-R0.1-SNAPSHOT]
        at kcauldron.updater.KVersionRetriever.uncaughtException(KVersionRetriever.java:114) [KVersionRetriever.class:1.7.10-R0.1-SNAPSHOT]
        at kcauldron.updater.KVersionRetriever.check(KVersionRetriever.java:108) [KVersionRetriever.class:1.7.10-R0.1-SNAPSHOT]
        at kcauldron.updater.KVersionRetriever.run(KVersionRetriever.java:69) [KVersionRetriever.class:1.7.10-R0.1-SNAPSHOT]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_161]
Caused by: org.apache.http.conn.HttpHostConnectException: Connect to api.prok.pw:443 [api.prok.pw/84.22.144.58] failed: Connection timed out: connect
        at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:151) ~[DefaultHttpClientConnectionOperator.class:4.4.1]
        at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353) ~[PoolingHttpClientConnectionManager.class:4.4.1]
        at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380) ~[MainClientExec.class:4.4.1]
        at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236) ~[MainClientExec.class:4.4.1]
        at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184) ~[ProtocolExec.class:4.4.1]
        at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88) ~[RetryExec.class:4.4.1]
        at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) ~[RedirectExec.class:4.4.1]
        at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184) ~[InternalHttpClient.class:4.4.1]
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) ~[CloseableHttpClient.class:4.4.1]
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107) ~[CloseableHttpClient.class:4.4.1]
        at kcauldron.updater.KVersionRetriever.check(KVersionRetriever.java:92) ~[KVersionRetriever.class:1.7.10-R0.1-SNAPSHOT]
        ... 2 more
Caused by: java.net.ConnectException: Connection timed out: connect
        at java.net.TwoStacksPlainSocketImpl.socketConnect(Native Method) ~[?:1.8.0_161]
        at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) ~[?:1.8.0_161]
        at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) ~[?:1.8.0_161]
        at java.net.AbstractPlainSocketImpl.connect(Unknown Source) ~[?:1.8.0_161]
        at java.net.PlainSocketImpl.connect(Unknown Source) ~[?:1.8.0_161]
        at java.net.SocksSocketImpl.connect(Unknown Source) ~[?:1.8.0_161]
        at java.net.Socket.connect(Unknown Source) ~[?:1.8.0_161]
        at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:337) ~[SSLConnectionSocketFactory.class:4.4.1]
        at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:134) ~[DefaultHttpClientConnectionOperator.class:4.4.1]
        at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353) ~[PoolingHttpClientConnectionManager.class:4.4.1]
        at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380) ~[MainClientExec.class:4.4.1]
        at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236) ~[MainClientExec.class:4.4.1]
        at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184) ~[ProtocolExec.class:4.4.1]
        at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88) ~[RetryExec.class:4.4.1]
        at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) ~[RedirectExec.class:4.4.1]
        at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184) ~[InternalHttpClient.class:4.4.1]
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) ~[CloseableHttpClient.class:4.4.1]
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107) ~[CloseableHttpClient.class:4.4.1]
        at kcauldron.updater.KVersionRetriever.check(KVersionRetriever.java:92) ~[KVersionRetriever.class:1.7.10-R0.1-SNAPSHOT]
        ... 2 more

是不是安装了跨版本

没有呢，我1.7.10的，我试着吧所有插件和MOD都删了，也还是会这样报错。

用什么核心

KCauldron  这个

插件MOD删完还是会这样？那你试试别用KC端吧，你在面板后台把核心换成其他的试试