/proc/self/root/proc/thread-self/root/proc/12/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 /.
[<0>] exit_to_user_mode_prepare+0x75/0x110[<0>] syscall_exit_to_user_mode+0x27/0xd0[<0>] do_syscall_64+0x43/0x50[<0>] entry_SYSCALL_64_after_hwframe+0x61/0xc6