Having trouble upgrading from 2.222.4 to any of the 2.235.* (tried .5).

When I switch the war file it never starts, enabled more logging:

{{INFO: Deploying web application archive jenkins.war
Aug 25, 2020 5:03:06 PM org.apache.catalina.startup.ContextConfig validateSecurityRoles
INFO: WARNING: Security role name ** used in an <auth-constraint> without being defined in a <security-role>
Aug 25, 2020 5:03:06 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Error configuring application listener of class hudson.WebAppMain
java.lang.NoClassDefFoundError: javax/servlet/SessionTrackingMode
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2663)
INFO: WARNING: Security role name ** used in an <auth-constraint> without being defined in a <security-role>
Aug 25, 2020 5:03:06 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Error configuring application listener of class hudson.WebAppMain
java.lang.NoClassDefFoundError: javax/servlet/SessionTrackingMode
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2663)
at java.lang.Class.getConstructor0(Class.java:3067)
at java.lang.Class.newInstance(Class.java:408)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3916)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4467)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:526)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:905)
at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:740)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:500)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:593)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: java.lang.ClassNotFoundException: javax.servlet.SessionTrackingMode
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1483)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1329)
... 28 more

Aug 25, 2020 5:03:06 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Skipped installing application listeners due to previous error(s)
Aug 25, 2020 5:03:06 PM org.apache.catalina.core.StandardContext start
SEVERE: Error listenerStart}}

Has this been seen before? When I flip the war file back to the old one its fine.{{}}