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