/proc/4/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 /.
19c740000-7ffc3c5bc000 ---p 00000000 00:00 0 [rollup]Rss: 257392 kBPss: 256646 kBPss_Anon: 200612 kBPss_File: 56034 kBPss_Shmem: 0 kBShared_Clean: 1488 kBShared_Dirty: 0 kBPrivate_Clean: 55292 kBPrivate_Dirty: 200612 kBReferenced: 257392 kBAnonymous: 200612 kBLazyFree: 0 kBAnonHugePages: 0 kBShmemPmdMapped: 0 kBFilePmdMapped: 0 kBShared_Hugetlb: 0 kBPrivate_Hugetlb: 0 kBSwap: 0 kBSwapPss: 0 kBLocked: 0 kB