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