HTTP Status 500 - No ImageGenerator with name stk

type Exception report

message No ImageGenerator with name stk

description The server encountered an internal error that prevented it from fulfilling this request.

exception

java.lang.IllegalArgumentException: No ImageGenerator with name stk
	info.magnolia.imaging.Imaging.generate(Imaging.java:69)
	info.magnolia.imaging.ImagingServlet.doGet(ImagingServlet.java:87)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	info.magnolia.cms.filters.ServletDispatchingFilter.doFilter(ServletDispatchingFilter.java:148)
	info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:81)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:81)
	info.magnolia.cms.filters.CompositeFilter.doFilter(CompositeFilter.java:65)
	info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	info.magnolia.virtualuri.VirtualUriFilter.doFilter(VirtualUriFilter.java:98)
	info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:81)
	info.magnolia.cms.i18n.I18nContentSupportFilter.doFilter(I18nContentSupportFilter.java:89)
	info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	info.magnolia.cms.filters.RangeSupportFilter.doFilter(RangeSupportFilter.java:77)
	info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	info.magnolia.cms.security.BaseSecurityFilter.doFilter(BaseSecurityFilter.java:57)
	info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:81)
	info.magnolia.cms.security.SecurityCallbackFilter.doFilter(SecurityCallbackFilter.java:84)
	info.magnolia.cms.filters.OncePerRequestAbstractMgnlFilter.doFilter(OncePerRequestAbstractMgnlFilter.java:59)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	info.magnolia.cms.security.LogoutFilter.doFilter(LogoutFilter.java:94)
	info.magnolia.cms.filters.OncePerRequestAbstractMgnlFilter.doFilter(OncePerRequestAbstractMgnlFilter.java:59)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	info.magnolia.module.site.filters.SiteMergeFilter.doFilter(SiteMergeFilter.java:119)
	info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	it.comuneweb.magnolia.agidUtils.site.ComuneWebMultiSiteFilter.doFilter(ComuneWebMultiSiteFilter.java:39)
	info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	info.magnolia.cms.filters.MultiChannelFilter.doFilter(MultiChannelFilter.java:83)
	info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:81)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:81)
	info.magnolia.cms.security.auth.login.LoginFilter.doFilter(LoginFilter.java:127)
	info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:81)
	info.magnolia.cms.filters.CosMultipartRequestFilter.doFilter(CosMultipartRequestFilter.java:111)
	info.magnolia.cms.filters.OncePerRequestAbstractMgnlFilter.doFilter(OncePerRequestAbstractMgnlFilter.java:59)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	info.magnolia.cms.filters.ContentTypeFilter.doFilter(ContentTypeFilter.java:155)
	info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	info.magnolia.cms.filters.ContextFilter.doFilter(ContextFilter.java:128)
	info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
	info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
	info.magnolia.cms.filters.CompositeFilter.doFilter(CompositeFilter.java:65)
	info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
	info.magnolia.cms.filters.SafeDestroyMgnlFilterWrapper.doFilter(SafeDestroyMgnlFilterWrapper.java:107)
	info.magnolia.cms.filters.MgnlFilterDispatcher.doDispatch(MgnlFilterDispatcher.java:67)
	info.magnolia.cms.filters.MgnlMainFilter.doFilter(MgnlMainFilter.java:110)
	info.magnolia.cms.filters.MgnlMainFilter.doFilter(MgnlMainFilter.java:96)

note The full stack trace of the root cause is available in the Apache Tomcat/8.5.5 logs.

Apache Tomcat/8.5.5