Failed to validate a sane '/dev'. help pls

[anonymous1234]

I have experience installing gentoo and this is the first time I have found myself in this issue, Usually, I use the LiveGUI installer on my machines, but this time, I am using the minimal installer and may have just missed something in the handbook even though I have gone through it again...
issue:
When running emerge -webrsync i get the following output:
* Cleaning up ...
Failed to validate a sane '/dev'.
bash process substitution doesn't work; this may be an indication of a broken '/dev/fd'.
so, i went online and found a few results for this error and apprently (???) i havent mounted chroot properly? but I am litteraly copy pasting from the handbook, idk what went wrong this time haha.
So I went and attempted to follow the solution someone else used a few years ago and tried running:
mount --rbind /dev /mnt/mychroot/dev
and I got:
mount: /mnt/mychroot/dev: mount point does not exist.
dmesg(1) may have more information after failed mount system call.

could someone help me please? (running this in a VM, SSHing into it from host system so I can Copy Paste from handbook)
thanks!

[Zucca]