/proc/self/root/proc/2/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 /.
7f7680000-7fff74391000 ---p 00000000 00:00 0 [rollup]Rss: 267800 kBPss: 266990 kBPss_Anon: 211008 kBPss_File: 55982 kBPss_Shmem: 0 kBShared_Clean: 1616 kBShared_Dirty: 0 kBPrivate_Clean: 55176 kBPrivate_Dirty: 211008 kBReferenced: 267800 kBAnonymous: 211008 kBLazyFree: 0 kBAnonHugePages: 0 kBShmemPmdMapped: 0 kBFilePmdMapped: 0 kBShared_Hugetlb: 0 kBPrivate_Hugetlb: 0 kBSwap: 0 kBSwapPss: 0 kBLocked: 0 kB