/proc/4/task/6/root/proc/thread-self/root/proc/thread-self/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 5 1 1cpu 6 59 1cpuacct 6 59 1blkio 9 56 1memory 8 73 1devices 3 56 1freezer 11 4 1net_cls 4 1 1perf_event 2 1 1net_prio 4 1 1hugetlb 7 1 1pids 10 56 1