/proc/self/task/4/root/proc/4/task/8/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 /.
66d5d00000-7fff357c3000 ---p 00000000 00:00 0 [rollup]Rss: 274780 kBPss: 273978 kBPss_Anon: 217968 kBPss_File: 56010 kBPss_Shmem: 0 kBShared_Clean: 1600 kBShared_Dirty: 0 kBPrivate_Clean: 55212 kBPrivate_Dirty: 217968 kBReferenced: 274780 kBAnonymous: 217968 kBLazyFree: 0 kBAnonHugePages: 0 kBShmemPmdMapped: 0 kBFilePmdMapped: 0 kBShared_Hugetlb: 0 kBPrivate_Hugetlb: 0 kBSwap: 0 kBSwapPss: 0 kBLocked: 0 kB