/proc/self/root/proc/thread-self/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 7 59 1cpuacct 7 59 1blkio 10 56 1memory 2 71 1devices 5 56 1freezer 6 4 1net_cls 3 1 1perf_event 8 1 1net_prio 3 1 1hugetlb 11 1 1pids 9 56 1