Only the word "Success" appears on the job listing. Placing the image's URL in my browser reveals this stacktrace:

java.lang.IllegalStateException: getWriter() has already been called for this response
net.bull.javamelody.FilterServletResponseWrapper.getOutputStream(FilterServletResponseWrapper.java:106)
javax.servlet.ServletResponseWrapper.getOutputStream(ServletResponseWrapper.java:102)
org.kohsuke.stapler.ResponseImpl.getOutputStream(ResponseImpl.java:59)
org.kohsuke.stapler.Stapler.serveStaticResource(Stapler.java:380)
org.kohsuke.stapler.Stapler.serveStaticResource(Stapler.java:217)
org.kohsuke.stapler.Stapler.service(Stapler.java:125)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:94)
hudson.plugins.audit_trail.AuditTrailFilter.doFilter(AuditTrailFilter.java:64)
hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:97)
hudson.plugins.greenballs.GreenBallFilter.doFilter(GreenBallFilter.java:56)
hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:97)
net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:420)
org.jvnet.hudson.plugins.monitoring.HudsonMonitoringFilter.doFilter(HudsonMonitoringFilter.java:43)
hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:97)
hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:86)
hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:47)
hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166)
hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
org.acegisecurity.ui.basicauth.BasicProcessingFilter.doFilter(BasicProcessingFilter.java:173)
hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:66)
hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)