/proc/4/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 /.
55a5ebb0a000-7ffd697fd000 ---p 00000000 00:00 0 [rollup]Rss: 5292 kBPss: 4580 kBPss_Anon: 2176 kBPss_File: 2404 kBPss_Shmem: 0 kBShared_Clean: 1420 kBShared_Dirty: 0 kBPrivate_Clean: 1696 kBPrivate_Dirty: 2176 kBReferenced: 5292 kBAnonymous: 2176 kBLazyFree: 0 kBAnonHugePages: 0 kBShmemPmdMapped: 0 kBFilePmdMapped: 0 kBShared_Hugetlb: 0 kBPrivate_Hugetlb: 0 kBSwap: 0 kBSwapPss: 0 kBLocked: 0 kB