Comment 2 for bug 2058179

I ran into the same issue here.

It's the same symptom. I'm running Noble with ZFS on root and kernel 6.8.

Setting up tomcat10-common (10.1.16-1) ...
Setting up tomcat10 (10.1.16-1) ...
Creating group 'tomcat' with GID 994.
Creating user 'tomcat' (Apache Tomcat) with UID 994 and GID 994.
Failed to backup /etc/group: Operation not supported
dpkg: error processing package tomcat10 (--configure):
 installed tomcat10 package post-installation script subprocess returned error exit status 1
Processing triggers for rsyslog (8.2312.0-3ubuntu3) ...
Processing triggers for libc-bin (2.39-0ubuntu2) ...
Errors were encountered while processing:
 tomcat10
E: Sub-process /usr/bin/dpkg returned an error code (1)