/proc/4/task/4/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 /.
2ad0540000-7ffc99d98000 ---p 00000000 00:00 0 [rollup]Rss: 260352 kBPss: 259592 kBPss_Anon: 204936 kBPss_File: 54656 kBPss_Shmem: 0 kBShared_Clean: 1516 kBShared_Dirty: 0 kBPrivate_Clean: 53900 kBPrivate_Dirty: 204936 kBReferenced: 260352 kBAnonymous: 204936 kBLazyFree: 0 kBAnonHugePages: 0 kBShmemPmdMapped: 0 kBFilePmdMapped: 0 kBShared_Hugetlb: 0 kBPrivate_Hugetlb: 0 kBSwap: 0 kBSwapPss: 0 kBLocked: 0 kB