/proc/self/task/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 4 1 1cpu 9 59 1cpuacct 9 59 1blkio 11 56 1memory 3 74 1devices 7 56 1freezer 5 4 1net_cls 6 1 1perf_event 10 1 1net_prio 6 1 1hugetlb 2 1 1pids 8 56 1