/proc/self/task/9/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 5 61 1cpuacct 5 61 1blkio 10 58 1memory 7 76 1devices 6 58 1freezer 3 4 1net_cls 2 1 1perf_event 4 1 1net_prio 2 1 1hugetlb 9 1 1pids 11 58 1