I install the GeoServer 2.18 in Windows Server 2012 r2, and with tomcat 9, JRE 1.8. it works fine. but I cannot change the layer title/name. when I want to change the name, and I will get the error message
java.lang.reflect.UndeclaredThrowableException
I find some way to try to fix, like use the Xmax=512M,
How do I solve this?