ClassNotFoundException: org.apache.coyote.http11.Http11Protocol after moving to JWS 5

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After moving to Tomcat 9 from JWS 5, we see an exception like the following:

SEVERE [main] org.apache.catalina.connector.Connector.<init> Protocol handler instantiation failed
 java.lang.ClassNotFoundException: org.apache.coyote.http11.Http11Protocol
    at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:264)
    at org.apache.catalina.connector.Connector.<init>(Connector.java:101)
    at org.apache.catalina.startup.ConnectorCreateRule.begin(ConnectorCreateRule.java:64)
    at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1188)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:509)
    at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:182)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1339)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2784)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:602)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:505)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:842)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:771)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:643)
    at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1453)
    at org.apache.catalina.startup.Catalina.load(Catalina.java:605)
    at org.apache.catalina.startup.Catalina.load(Catalina.java:656)
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