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: 1823
Hash: 33d8c26a19312e96aa754a4e47308a3e0042a1f814f26d235ee22b0e29e2dea5
Previous block: 77d58557df02e63aa2e57193d3816bd22611016ccd7a83167b93d2fcc52e985b
Next block: 3942f16db01cf483c52c25ebcb85fcb92f41c67190b0b65f1c998e64a92abeef
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159227
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: ab1a4430ccdc435364077306153992fc063dce1a75be92df9c086e80f4042949
Median time: 1719159226
Difficulty: 4.656542373906925e-10
Confirmations: 421
Chainwork: 0000000000000000000000000000000000000000000000000000000000000e40
Bits: 207fffff