/proc/self/root/proc/4/root/proc/self/task/5/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 /.
#subsys_name hierarchy num_cgroups enabledcpuset 2 1 1cpu 8 52 1cpuacct 8 52 1blkio 7 49 1memory 10 66 1devices 3 49 1freezer 5 4 1net_cls 6 1 1perf_event 11 1 1net_prio 6 1 1hugetlb 9 1 1pids 4 49 1