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