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: 1491
Hash: 04c0f08cc46a4dfcd2635b252c4975f2f5870a9580c3429014a5537c5cc5a08c
Previous block: 00f008bbd4b884054a1b4832a3f388456d691a4a0f3b1c5273e4141fd5a226c3
Next block: 6cc03cb23c65c18a0bdea5eef4f148e2c894dc9e5e18754fc3499c6c0a8c61f5
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697656
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: bd2deb4e916e716bdf170fa148331fae7a05ff295f550d8b88b0b558a3bbf638
Median time: 1718697655
Difficulty: 4.656542373906925e-10
Confirmations: 753
Chainwork: 0000000000000000000000000000000000000000000000000000000000000ba8
Bits: 207fffff