/proc/self/root/proc/1/task/1/root/proc/thread-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 /.
00400000-7ffc4b8e7000 ---p 00000000 00:00 0 [rollup]Rss: 251772 kBPss: 250562 kBPss_Anon: 198524 kBPss_File: 52038 kBPss_Shmem: 0 kBShared_Clean: 1900 kBShared_Dirty: 0 kBPrivate_Clean: 51348 kBPrivate_Dirty: 198524 kBReferenced: 251772 kBAnonymous: 198524 kBLazyFree: 0 kBAnonHugePages: 0 kBShmemPmdMapped: 0 kBFilePmdMapped: 0 kBShared_Hugetlb: 0 kBPrivate_Hugetlb: 0 kBSwap: 0 kBSwapPss: 0 kBLocked: 0 kB