/proc/self/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 0x7ffc2e1d9090 0x400 0x1c 0x0 0x8 0x7ffc2e1d8300 0x7fbd6b79bec8