Can't create UserID for dataset permission

Current situation:
When I setup a user with full permission at dataset I get a warning:
“With this configuration, the existing directory ‘/mnt/VM_Docker’ will be used as a home directory without creating a new directory for the user.”

When I confirm the warning I get the error:
“[EINVAL] user_create.home: The specified path is a ZFS pool mountpoint “(/mnt/VM_Docker)”.”
Background:
I need permission for filebrowser to edit different paths in the dataset.
I will not give full permission to apps-user(568).

Thanks.

You should create a dataset and target that rather than the root of the pool.

Sorry…
I thought i had use a dataset…/mnt/VM_Docker, /mnt/xyz, /mnt/…
Dataset means the subfolders of /mnt/VM_Docker?

Create a dataset that isn’t the root-level dataset of the zpool. C.f. the documentation.