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