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: 1990
Hash: 10bf925b8903fde1a43263b0511ffca332c113be26f24578961f08e4cb17d1c6
Previous block: 30e42c8f87b1e151bf8cb7dc458dfa36f3a7b609ed4443f05ea63d5e2edba406
Next block: 0b13bd68af49ca0e4e3627f337ca3822c049ec0f46e3848970e6c9c55c8b7346
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159255
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 5d2b0cd68ad01fcf834eee0e4051725781622552af2919bd88b7f9b05bcfb7b3
Median time: 1719159254
Difficulty: 4.656542373906925e-10
Confirmations: 254
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f8e
Bits: 207fffff