/proc/4/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:cpuset:/8:pids:/7:blkio:/6:memory:/5:cpu,cpuacct:/4:devices:/3:net_cls,net_prio:/2:freezer:/1:name=systemd:/