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Error processing GroovyPageView: Error executing tag <twbs:row>: Error executing tag <twbs:column>: Cannot get property 'user' on null object
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Error processing GroovyPageView: Error executing tag <modalbox:modalIncludes>: assert f.delete() | | | false /var/lib/tomcat7/work/Catalina/localhost/Ghertor/grails-resources/plugins/modalbox-0.4/js/modalbox
java.lang.NullPointerException: Cannot get property 'user' on null object	at gsp_tekvideo_coursesignup_gsp$_run_closure2$_closure6$_closure10.doCall(gsp_tekvideo_coursesignup_gsp.groovy:60)	at dk.danthrane.twbs.GridTagLib$_closure3.doCall(GridTagLib.groovy:68)	at gsp_tekvideo_coursesignup_gsp$_run_closure2$_closure6.doCall(gsp_tekvideo_coursesignup_gsp.groovy:67)	at dk.danthrane.twbs.GridTagLib$_closure2.doCall(GridTagLib.groovy:20)	at gsp_tekvideo_coursesignup_gsp$_run_closure2.doCall(gsp_tekvideo_coursesignup_gsp.groovy:104)	at gsp_tekvideo_coursesignup_gsp.run(gsp_tekvideo_coursesignup_gsp.groovy:160)	at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:198)	at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)	at grails.plugin.springsecurity.web.filter.GrailsAnonymousAuthenticationFilter.doFilter(GrailsAnonymousAuthenticationFilter.java:53)	at grails.plugin.springsecurity.web.authentication.logout.MutableLogoutFilter.doFilter(MutableLogoutFilter.java:62)	at grails.plugin.springsecurity.web.SecurityRequestHolderFilter.doFilter(SecurityRequestHolderFilter.java:59)	at org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:100)	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)