The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 1678
Hash: 77d5f49b4f4ea5589b4c134a1bceb558741b983eaff147e7cdede83782c728e1
Previous block: 231ae8ce94feef44534c74af2b2ccca25eb2ec73d53696e3e2059f444278427e
Next block: 48017de30b9f60b901733ff734f8739e7dc8cd34c90932936f1773c0a35df757
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159203
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 8fa220106e248a04f385bc21d28d7f28499be0fe3333ad0c8815f999d3dc3734
Median time: 1719159202
Difficulty: 4.656542373906925e-10
Confirmations: 566
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d1e
Bits: 207fffff