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: 2557
Hash: 4128e0621d7ab37a361ac97d72bd947d42365e9ff87d02c9aa44a89efe59f166
Previous block: 0eed231f8b2c1cad7838972f43f1349f12eaa64780375b74c825e95c71fcd937
Next block: 6bda1de66f0cbb8c21ad1b324ac4bb6f8623dea8cdbf970640e1c1b0fe29137f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847313
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 5d3869e5bc3f9d447fa6e0768355cdf31fd1a731f59b9382bca781585974e525
Median time: 1743847312
Difficulty: 4.656542373906925e-10
Confirmations: 86
Chainwork: 00000000000000000000000000000000000000000000000000000000000013fc
Bits: 207fffff