/proc/self/root/proc/4/root/proc/4/task/7/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 /.
127f280000-7ffc229d4000 ---p 00000000 00:00 0 [rollup]Rss: 257272 kBPss: 256476 kBPss_Anon: 200564 kBPss_File: 55912 kBPss_Shmem: 0 kBShared_Clean: 1588 kBShared_Dirty: 0 kBPrivate_Clean: 55120 kBPrivate_Dirty: 200564 kBReferenced: 257272 kBAnonymous: 200564 kBLazyFree: 0 kBAnonHugePages: 0 kBShmemPmdMapped: 0 kBFilePmdMapped: 0 kBShared_Hugetlb: 0 kBPrivate_Hugetlb: 0 kBSwap: 0 kBSwapPss: 0 kBLocked: 0 kB