support time namespace for ubuntu with systemd use

Question

I have Ubuntu 21.04, and need to support systemd for minikube use.

For minikube support, which needs the systemd (also calls systemctl), I found a workaround solution for adding systemd deamon support in:

minikube for ubuntu

When trying running any script related to: daemonize, and running /usr/bin/nsenter -t "$SYSTEMD_PID" -a, I got and error:

cannot open /proc/27791/ns/time: No such file or directory

I investigated a bit, and find in: linux namespace that (as in the link):

Time (CLONE_NEWTIME; /proc/pid/ns/time) <= very new!

I assume it is new namespace with new support, so there might be an installation, whenever I need to downgrade or having upgrade of a version for a specific installation.

Whether is deamonatize service or another service.

when running lsns -l I get:

I see there is no namespace of time.

What should I do in order to support /proc/pid/ns/time (or downgrade/upgrade a specific version - how can I do that)?

Thanks.