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