/proc/4/task/9/root/proc/thread-self/root/proc/self/task/9/root/proc/4
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 /.
f54b700000-7ffe14bf3000 ---p 00000000 00:00 0 [rollup]Rss: 117504 kBPss: 116748 kBPss_Anon: 60952 kBPss_File: 55796 kBPss_Shmem: 0 kBShared_Clean: 1508 kBShared_Dirty: 0 kBPrivate_Clean: 55044 kBPrivate_Dirty: 60952 kBReferenced: 117504 kBAnonymous: 60952 kBLazyFree: 0 kBAnonHugePages: 0 kBShmemPmdMapped: 0 kBFilePmdMapped: 0 kBShared_Hugetlb: 0 kBPrivate_Hugetlb: 0 kBSwap: 0 kBSwapPss: 0 kBLocked: 0 kB