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