/proc/self/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 4 1 1cpu 2 52 1cpuacct 2 52 1blkio 6 49 1memory 9 65 1devices 8 49 1freezer 11 4 1net_cls 5 1 1perf_event 10 1 1net_prio 5 1 1hugetlb 7 1 1pids 3 49 1