/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 5 1 1cpu 8 59 1cpuacct 8 59 1blkio 11 56 1memory 2 75 1devices 3 56 1freezer 9 4 1net_cls 10 1 1perf_event 4 1 1net_prio 10 1 1hugetlb 6 1 1pids 7 56 1