javax.servlet.ServletException: org.jasig.cas.client.validation.TicketValidationException: No assertions found.
	org.jasig.cas.client.validation.AbstractTicketValidationFilter.doFilter(AbstractTicketValidationFilter.java:227)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
	org.grails.web.servlet.mvc.GrailsWebRequestFilter.doFilterInternal(GrailsWebRequestFilter.java:77)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
	org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:97)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
	org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:121)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)
	org.springframework.boot.web.support.ErrorPageFilter.forwardToErrorPage(ErrorPageFilter.java:190)
	org.springframework.boot.web.support.ErrorPageFilter.handleException(ErrorPageFilter.java:175)
	org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:142)
	org.springframework.boot.web.support.ErrorPageFilter.access$000(ErrorPageFilter.java:66)
	org.springframework.boot.web.support.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:103)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.boot.web.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:121)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)