/proc/thread-self/root/proc/thread-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 /.
4e73380000-7ffc2d3d9000 ---p 00000000 00:00 0 [rollup]Rss: 227556 kBPss: 226790 kBPss_Anon: 172228 kBPss_File: 54562 kBPss_Shmem: 0 kBShared_Clean: 1528 kBShared_Dirty: 0 kBPrivate_Clean: 53800 kBPrivate_Dirty: 172228 kBReferenced: 227556 kBAnonymous: 172228 kBLazyFree: 0 kBAnonHugePages: 0 kBShmemPmdMapped: 0 kBFilePmdMapped: 0 kBShared_Hugetlb: 0 kBPrivate_Hugetlb: 0 kBSwap: 0 kBSwapPss: 0 kBLocked: 0 kB