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