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. mupBAc74k

Height: 2221
Hash: 653f0690ef7b6226bfb3dffe21226002f64be467dcbbe8a91b2be4442264fe24
Previous block: 6067196b18208110277a3ca2ad6d9c5c206f003c31e535a5589a8116df61f8a6
Next block: 5f68f413d70bd046f3240ec5974f8cf18b83a24e1b93058e277a5474613ebf25
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719480979
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: c29aab91749aacb47d25966fb26df146bbc83805371775a45d70017273c2df3f
Median time: 1719480979
Difficulty: 4.656542373906925e-10
Confirmations: 71
Chainwork: 000000000000000000000000000000000000000000000000000000000000115c
Bits: 207fffff