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java.lang.NullPointerException: 	at com.atlassian.confluence.util.http.httpclient.HttpClientHttpRetrievalService.newHttpClient(HttpClientHttpRetrievalService.java:185)	at com.atlassian.confluence.util.http.httpclient.HttpClientHttpRetrievalService.newHttpClient(HttpClientHttpRetrievalService.java:177)	at com.atlassian.confluence.util.http.httpclient.HttpClientHttpRetrievalService.get(HttpClientHttpRetrievalService.java:46)	at com.atlassian.confluence.util.http.BaseHttpRetrievalService.get(BaseHttpRetrievalService.java:19)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at com.atlassian.plugin.osgi.hostcomponents.impl.DefaultComponentRegistrar$ContextClassLoaderSettingInvocationHandler.invoke(DefaultComponentRegistrar.java:129)	at com.sun.proxy.$Proxy292.get(Unknown Source)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at com.atlassian.plugin.osgi.bridge.external.HostComponentFactoryBean$DynamicServiceInvocationHandler.invoke(HostComponentFactoryBean.java:154)	at com.sun.proxy.$Proxy292.get(Unknown Source)	at com.atlassian.confluence.plugins.gadgets.GadgetPlaceholderServlet.getIconStream(GadgetPlaceholderServlet.java:196)