Error bringing up a shell

[adboer]

Describe the bug
When I try to start the container with systemd-nspawn -M debian-custom -D /data/custom/machines/debian-custom I get the error Failed to allocate a pty: No such file or directory

To Reproduce
Steps to reproduce the behavior:

1. Run the command above.

UDM Information

• UXG Lite 3.1.16

Additional context
When I run it with systemd-nspawn -M debian-custom -D /data/custom/machines/debian-custom -P it continues. I'm not sure what pipe mode means and if this is a good thing to do. It failes when creating a service later on, so not even a real solution.

When doing some troubleshooting I see i probably failes in the procedure openpt_allocate. But from the I'm totally lost. On Windows I can run processmon.exe to troubleshoot, on Linux I don't know my way.