/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 9 1 1cpu 10 38 1cpuacct 10 38 1blkio 6 35 1memory 11 50 1devices 8 35 1freezer 7 4 1net_cls 5 1 1perf_event 3 1 1net_prio 5 1 1hugetlb 4 1 1pids 2 35 1