/proc/4/task/8/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 /.
2140cc0000-7ffffe0f3000 ---p 00000000 00:00 0 [rollup]Rss: 182180 kBPss: 181394 kBPss_Anon: 126732 kBPss_File: 54662 kBPss_Shmem: 0 kBShared_Clean: 1568 kBShared_Dirty: 0 kBPrivate_Clean: 53880 kBPrivate_Dirty: 126732 kBReferenced: 182180 kBAnonymous: 126732 kBLazyFree: 0 kBAnonHugePages: 0 kBShmemPmdMapped: 0 kBFilePmdMapped: 0 kBShared_Hugetlb: 0 kBPrivate_Hugetlb: 0 kBSwap: 0 kBSwapPss: 0 kBLocked: 0 kB