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