/proc/self/root/proc/thread-self/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 /.
00400000-7ffde0591000 ---p 00000000 00:00 0 [rollup]Rss: 69336 kBPss: 68118 kBPss_Anon: 22888 kBPss_File: 45230 kBPss_Shmem: 0 kBShared_Clean: 1944 kBShared_Dirty: 0 kBPrivate_Clean: 44504 kBPrivate_Dirty: 22888 kBReferenced: 69336 kBAnonymous: 22888 kBLazyFree: 0 kBAnonHugePages: 0 kBShmemPmdMapped: 0 kBFilePmdMapped: 0 kBShared_Hugetlb: 0 kBPrivate_Hugetlb: 0 kBSwap: 0 kBSwapPss: 0 kBLocked: 0 kB