Snap install of Notepad++

Have just installed Notepad++ (great text editor…) using snap:

sudo snap install notepad-plus-plus

which uses wine to run.
Have setup to open .txt files, and works fine locally (home directory), but with anything else (ie opening something from /etc, just to read), which something like kate has no issues with, notepad++ gives: “Can not open file Z:\etc\fstab”.
Permissions/file system?

Security… by design.

Thanks for that.