/proc/4
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 /.
11:cpuset:/10:devices:/9:net_cls,net_prio:/8:pids:/7:hugetlb:/6:freezer:/5:cpu,cpuacct:/4:perf_event:/3:memory:/2:blkio:/1:name=systemd:/