HTTP ERROR 503 ServletResolver service missing, cannot service requests

URI:/content/keysight/mx/en/product/U7231B/ddr3-lpddr3-compliance-test-application-infiniium-series.html
STATUS:503
MESSAGE:ServletResolver service missing, cannot service requests
SERVLET:org.apache.felix.http.base.internal.dispatch.DispatcherServlet-70da62dd