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: 1956
Hash: 5256cff631943b71037d9cb6727c5fcc28d0fceeb41e07dc14d6295315f72e33
Previous block: 4275e99b585ffb0a046ecaf73970227e3293f36ad8f31219a3e548fa5ea36547
Next block: 0014609bc2cac0ae28b35496c4dc17c0289cc5f721981e13679ba4e12bd53cb6
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159249
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 866e3c7bc7433997e6b2e5c21d8ebb2cf611e9f3bca2cb78f99a8e0e15cf9a1c
Median time: 1719159248
Difficulty: 4.656542373906925e-10
Confirmations: 288
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f4a
Bits: 207fffff