/proc/4/task/7/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 4 1 1cpu 5 36 1cpuacct 5 36 1blkio 11 33 1memory 2 46 1devices 9 33 1freezer 3 4 1net_cls 8 1 1perf_event 6 1 1net_prio 8 1 1hugetlb 10 1 1pids 7 33 1