I’ve commented on this in several other threads lately - why does Lucee 5 Express come with Tomcat 9 while Lucee 6 Express comes with Tomcat 8? That’s a big step backwards!
Also, it causes an error message during startup, which is caused by Tomcat 8 not being able to handle a certain kind of class, but Tomcat 9 can handle it fine. I reported that here on August 7:
I never got any answer, nobody ever replied. Maybe they will now!