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