/proc/thread-self/root/proc/thread-self/root/proc/12/task/21
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 /.
00400000-7ffcc1133000 ---p 00000000 00:00 0 [rollup]Rss: 212712 kBPss: 211543 kBPss_Anon: 159428 kBPss_File: 52115 kBPss_Shmem: 0 kBShared_Clean: 1888 kBShared_Dirty: 0 kBPrivate_Clean: 51396 kBPrivate_Dirty: 159428 kBReferenced: 212712 kBAnonymous: 159428 kBLazyFree: 0 kBAnonHugePages: 0 kBShmemPmdMapped: 0 kBFilePmdMapped: 0 kBShared_Hugetlb: 0 kBPrivate_Hugetlb: 0 kBSwap: 0 kBSwapPss: 0 kBLocked: 0 kB