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: 1987
Hash: 345d5a847caffca43740f96d7d20ed118f41ca708e8745f24bddaed0dd7b78c3
Previous block: 4a955534eb14479710f6ce5f84089206730817dc6c73b2abe2bafab27cf11205
Next block: 367d414b4fcececee6f38c14055f291f330179cc6fe853d8b6b29308a119b73b
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159254
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: ae7e700eb8120723ff00f2751324cb4526334968c6efe7be90c2073316765813
Median time: 1719159254
Difficulty: 4.656542373906925e-10
Confirmations: 257
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f88
Bits: 207fffff