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