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java.lang.IllegalArgumentException: protocol = http host = null	at sun.net.spi.DefaultProxySelector.select(DefaultProxySelector.java:176)	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1099)	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999)	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:933)	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1513)	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441)	at com.sun.webkit.network.URLLoader.close(URLLoader.java:591)	at com.sun.webkit.network.URLLoader.doRun(URLLoader.java:173)	at com.sun.webkit.network.URLLoader.lambda$run$91(URLLoader.java:128)	at java.security.AccessController.doPrivileged(Native Method)	at com.sun.webkit.network.URLLoader.run(URLLoader.java:127)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)