Resource not found at path /content/keysight/my/fa/other/404.html (404)

The requested URL /content/keysight/my/fa/other/404.html resulted in an error in Apache Sling Core Default Servlet.

Request Progress:

      0 TIMER_START{Request Processing}
      0 COMMENT timer_end format is {<elapsed microseconds>,<timer name>} <optional message>
      2 LOG Method=GET, PathInfo=null
      3 TIMER_START{handleSecurity}
    811 TIMER_END{808,handleSecurity} authenticator org.apache.sling.auth.core.impl.SlingAuthenticator@4ededc2c returns true
    986 TIMER_START{ResourceResolution}
   2798 TIMER_END{1811,ResourceResolution} URI=/content/keysight/my/fa/other/404.html resolves to Resource=NonExistingResource, path=/content/keysight/my/fa/other/404.html
   2802 LOG Resource Path Info: SlingRequestPathInfo: path='/content/keysight/my/fa/other/404.html', selectorString='null', extension='html', suffix='null'
   2802 TIMER_START{ServletResolution}
   2803 TIMER_START{resolveServlet(/content/keysight/my/fa/other/404.html)}
   3163 LOG {0}: no servlet found
   3166 TIMER_END{362,resolveServlet(/content/keysight/my/fa/other/404.html)} Using servlet Apache Sling Core Default Servlet
   3168 TIMER_END{365,ServletResolution} URI=/content/keysight/my/fa/other/404.html handled by Servlet=Apache Sling Core Default Servlet
   3169 LOG Applying Requestfilters
   3173 LOG Calling filter: com.adobe.granite.resourceresolverhelper.impl.ResourceResolverHelperImpl
   3176 LOG Calling filter: org.apache.sling.security.impl.ContentDispositionFilter
   3178 LOG Calling filter: com.adobe.granite.csrf.impl.CSRFFilter
   3182 LOG Calling filter: org.apache.sling.i18n.impl.I18NFilter
   3184 LOG Calling filter: com.adobe.acs.commons.redirects.filter.RedirectFilter
   3283 LOG Calling filter: com.adobe.granite.httpcache.impl.InnerCacheFilter
   3285 LOG Calling filter: org.apache.sling.rewriter.impl.RewriterFilter
   3287 LOG Calling filter: com.day.cq.wcm.core.impl.WCMRequestFilter
   3288 LOG Calling filter: com.adobe.cq.wcm.core.components.internal.servlets.CoreFormHandlingServlet
   3290 LOG Calling filter: com.adobe.granite.optout.impl.OptOutFilter
   3293 LOG Calling filter: com.day.cq.wcm.foundation.forms.impl.FormsHandlingServlet
   3295 LOG Calling filter: com.adobe.cq.social.commons.cors.CORSAuthenticationFilter
   3297 LOG Calling filter: com.keysight.elasticsearch.filters.KeysightAEMPageRequestFilter
   3377 LOG Calling filter: org.apache.sling.engine.impl.debug.RequestProgressTrackerLogFilter
   3381 LOG Calling filter: com.adobe.cq.wcm.core.extensions.amp.internal.AmpModeForwardFilter
   3390 LOG Calling filter: org.apache.sling.dynamicinclude.CacheControlFilter
   3395 LOG Calling filter: com.keysightblog.core.filters.LoggingFilter
   3397 LOG Calling filter: com.keysight.sso.services.impl.SSOFilter
   4355 LOG Calling filter: com.day.cq.wcm.mobile.core.impl.redirect.RedirectFilter
   4357 LOG Calling filter: com.day.cq.wcm.core.impl.AuthoringUIModeServiceImpl
   4360 LOG Calling filter: com.adobe.granite.rest.assets.impl.AssetContentDispositionFilter
   4362 LOG Calling filter: com.adobe.granite.requests.logging.impl.RequestLoggerImpl
   4365 LOG Calling filter: com.adobe.granite.rest.impl.servlet.ApiResourceFilter
   4367 LOG Calling filter: com.day.cq.dam.core.impl.servlet.ActivityRecordHandler
   4373 LOG Calling filter: com.adobe.cq.social.ugcbase.security.impl.SaferSlingPostServlet
   4375 LOG Calling filter: org.apache.sling.dynamicinclude.SyntheticResourceFilter
   4378 LOG Calling filter: com.day.cq.dam.core.impl.assetlinkshare.AdhocAssetShareAuthHandler
   4381 LOG Applying Componentfilters
   4382 LOG Calling filter: com.day.cq.personalization.impl.TargetComponentFilter
   4384 LOG Calling filter: com.day.cq.wcm.core.impl.page.PageLockFilter
   4390 TIMER_START{Apache Sling Core Default Servlet#0}
   4396 LOG Applying Error filters
   4397 LOG Calling filter: org.apache.sling.i18n.impl.I18NFilter
   4398 LOG Calling filter: org.apache.sling.rewriter.impl.RewriterFilter
   4401 TIMER_START{handleError:status=404}
   4697 TIMER_END{295,handleError:status=404} Using handler Sling (Ad Hoc) Default Error Handler Servlet
   4804 LOG Ignoring found processor for post processing ProcessorConfiguration: {contentTypes=[text/html], order=1010, active=true, valid=true, processErrorResponse=true, pipeline=(generator=Config(type=htmlparser, config=JcrPropertyMap [node=Node[NodeDelegate{tree=/apps/keysight/config/rewriter/default/generator-htmlparser: { jcr:primaryType = nt:unstructured, includeTags = [A, /A, IMG, AREA, FORM, BASE, LINK, SCRIPT, BODY, /BODY]}}], values={jcr:primaryType=nt:unstructured, includeTags=[Ljava.lang.String;@5186c4b1}]), transformers=(Config(type=linkrewriter, config=JcrPropertyMap [node=Node[NodeDelegate{tree=/apps/keysight/config/rewriter/default/transformer-linkrewriter: { jcr:primaryType = nt:unstructured, component-optional = false}}], values={jcr:primaryType=nt:unstructured, component-optional=false}]), Config(type=linkchecker, config={}), Config(type=linktype, config={}), Config(type=mobile, config=JcrPropertyMap [node=Node[NodeDelegate{tree=/apps/keysight/config/rewriter/default/transformer-mobile: { jcr:primaryType = nt:unstructured, component-optional = true}}], values={jcr:primaryType=nt:unstructured, component-optional=true}]), Config(type=mobiledebug, config=JcrPropertyMap [node=Node[NodeDelegate{tree=/apps/keysight/config/rewriter/default/transformer-mobiledebug: { jcr:primaryType = nt:unstructured, component-optional = true}}], values={jcr:primaryType=nt:unstructured, component-optional=true}]), Config(type=contentsync, config=JcrPropertyMap [node=Node[NodeDelegate{tree=/apps/keysight/config/rewriter/default/transformer-contentsync: { jcr:primaryType = nt:unstructured, component-optional = true}}], values={jcr:primaryType=nt:unstructured, component-optional=true}]), Config(type=versioned-clientlibs, config={}), serializer=Config(type=htmlwriter, config={}))} as an error occured (org.apache.sling.api.SlingException: Unable to setup processor: Unable to get component of class 'interface org.apache.sling.rewriter.Transformer' with type 'linkchecker'.) during setup while processing another error.
   4970 LOG Ignoring found processor for post processing ProcessorConfiguration: {contentTypes=[text/html], order=-1, active=true, valid=true, processErrorResponse=true, pipeline=(generator=Config(type=htmlparser, config={}), transformers=(Config(type=linkchecker, config={}), Config(type=mobile, config=JcrPropertyMap [node=Node[NodeDelegate{tree=/libs/cq/config/rewriter/default/transformer-mobile: { jcr:primaryType = nt:unstructured, component-optional = true}}], values={jcr:primaryType=nt:unstructured, component-optional=true}]), Config(type=mobiledebug, config=JcrPropertyMap [node=Node[NodeDelegate{tree=/libs/cq/config/rewriter/default/transformer-mobiledebug: { jcr:primaryType = nt:unstructured, component-optional = true}}], values={jcr:primaryType=nt:unstructured, component-optional=true}]), Config(type=contentsync, config=JcrPropertyMap [node=Node[NodeDelegate{tree=/libs/cq/config/rewriter/default/transformer-contentsync: { jcr:primaryType = nt:unstructured, component-optional = true}}], values={jcr:primaryType=nt:unstructured, component-optional=true}]), serializer=Config(type=htmlwriter, config={}))} as an error occured (org.apache.sling.api.SlingException: Unable to setup processor: Unable to get component of class 'interface org.apache.sling.rewriter.Transformer' with type 'linkchecker'.) during setup while processing another error.
   5030 TIMER_END{5029,Request Processing} Dumping SlingRequestProgressTracker Entries

Apache Sling