/proc/net
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 /.
Num RefCount Protocol Flags Type St Inode Path0000000000000000: 00000003 00000000 00000000 0001 03 48240000000000000000: 00000003 00000000 00000000 0001 03 48560000000000000000: 00000003 00000000 00000000 0001 03 48690000000000000000: 00000003 00000000 00000000 0001 03 5178 /tmp/vercel-1445073459.sock0000000000000000: 00000003 00000000 00000000 0001 03 48550000000000000000: 00000003 00000000 00000000 0001 03 4823