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