/proc/4/task/10/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 0x7ffd1b0a0ca0 0x400 0xa2 0x0 0x8 0x7ffd1b09ff10 0x7f0624226ec8