/proc/self/root/proc/4
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 /.
21bc500000-7ffe500dc000 ---p 00000000 00:00 0 [rollup]Rss: 802344 kBPss: 801586 kBPss_Anon: 746920 kBPss_File: 54666 kBPss_Shmem: 0 kBShared_Clean: 1512 kBShared_Dirty: 0 kBPrivate_Clean: 53912 kBPrivate_Dirty: 746920 kBReferenced: 802344 kBAnonymous: 746920 kBLazyFree: 0 kBAnonHugePages: 0 kBShmemPmdMapped: 0 kBFilePmdMapped: 0 kBShared_Hugetlb: 0 kBPrivate_Hugetlb: 0 kBSwap: 0 kBSwapPss: 0 kBLocked: 0 kB