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