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