TOMCAT CVE-2020-1938: Ghostcat (AJP)

OS windows Server 2012 using IIS & Lucee Installer & boncode
I’ve tried to update tomcat 8 to 8.5.51 just by doing the following steps:

I can successfully access port 8888 an every domain and it seems to be all good, but somehow the boncode connector doesn’t get connected. I’m receiving a:

Error connecting to Apache Tomcat instance.
Please check that a Tomcat server is running at given location and port.
Details:
Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte 127.0.0.1:8009

You can change this message by changing TomcatConnectErrorURL setting in setting file.

Is there something I am missing? Do I have to update something for the boncode connector?

UPDATE: catalina.log

23-Feb-2020 10:21:56.948 SCHWERWIEGEND [main] org.apache.catalina.core.StandardService.startInternal Failed to start connector [Connector[AJP/1.3-8009]]
	org.apache.catalina.LifecycleException: Der Start des Protokoll-Handlers ist fehlgeschlagen
		at org.apache.catalina.connector.Connector.startInternal(Connector.java:1057)
		at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
		at org.apache.catalina.core.StandardService.startInternal(StandardService.java:440)
		at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
		at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:766)
		at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
		at org.apache.catalina.startup.Catalina.start(Catalina.java:688)
		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:498)
		at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:343)
		at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:474)
	Caused by: java.lang.IllegalArgumentException: The AJP Connector is configured with secretRequired="true" but the secret attribute is either null or "". This combination is not valid.
		at org.apache.coyote.ajp.AbstractAjpProtocol.start(AbstractAjpProtocol.java:274)
		at org.apache.catalina.connector.Connector.startInternal(Connector.java:1055)
		... 12 more