/proc/self/root/proc/1/task/1/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 0 4 1cpu 0 4 1cpuacct 0 4 1blkio 0 4 1memory 0 4 1devices 0 4 1freezer 0 4 1net_cls 0 4 1perf_event 0 4 1net_prio 0 4 1hugetlb 0 4 1pids 0 4 1