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