/proc/self/root/proc/4/root/proc
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 /.
CPU0 CPU1 HI: 0 0 TIMER: 572 574 NET_TX: 0 0 NET_RX: 5544 5802 BLOCK: 158 2437 IRQ_POLL: 0 0 TASKLET: 8 68 SCHED: 1364 1218 HRTIMER: 0 0 RCU: 2665 2940