/proc/4/root/proc/self
This explorer reads the filesystem of the server it runs on, so /workspace/user isn't present here. Browsing and the terminal still work against this server's own disk from /.
281 0xd 0x7ffd10b2c2f0 0x400 0x194 0x0 0x8 0x7ffd10b2b560 0x7f0018fccec8