Expect doesn't have permissions

I am running an Ubuntu Server 18.04 on QEMU, and installed expect using sudo snap install expect.

From inside expect, I get permission denied for many things, e.g.:

expect1.1> ls .
/bin/ls: cannot open directory '.': Permission denied
child process exited abnormally
    while executing
"exec >&@stdout <@stdin /bin/ls ."
    invoked from within
"ls ."

But also:

expect1.2> stat .
  File: '.'
  [...]
Access: (0755/drwxr-xr-x)  Uid: ( 1000/    oren)   Gid: ( 1000/    oren)
[...]

I tried running expect using sudo expect, but got the same behavior.

Moreover, running ls .. from within expect works fine.

Why do I get the "Permission denied" error?