/proc/4/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 /.
#subsys_name hierarchy num_cgroups enabledcpuset 9 1 1cpu 7 61 1cpuacct 7 61 1blkio 3 58 1memory 6 74 1devices 4 58 1freezer 8 4 1net_cls 2 1 1perf_event 5 1 1net_prio 2 1 1hugetlb 10 1 1pids 11 58 1