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: 2108
Hash: 4779799cf8b7bc3024877e74ba228b0e086ef86280331b66404832d41752821a
Previous block: 43e1da4fb573378102e0ffe16850cc626f1498d78f08369db08eee3119898a0e
Next block: 00ce899ca67a54a67954eaed06e73c6ad26eab971db33d1ce76c9aa837b289f7
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1728964788
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: cf269cddd473382c63301b247bfdab48325d29f944bd9b6bddf09e90ae6f89ce
Median time: 1728964787
Difficulty: 4.656542373906925e-10
Confirmations: 136
Chainwork: 000000000000000000000000000000000000000000000000000000000000107a
Bits: 207fffff