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