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: 2237
Hash: 301a47adb85ac43c2b2923460482028b71e021dc0e6054c401525098973be7fa
Previous block: 46bf5fbaad07ba164cf0e55c72e20bb64ce58568069e7654fe9eb334b2668deb
Next block: 5fb5a9fdfbc3232dd3498e6abe333de81264eac4504bd2c8dffe9f47b84c12c4
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719480982
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: cfda28420a558dc43edc06a851b0f140d4a52643cd60f8b5d85e9c1876fcb94d
Median time: 1719480981
Difficulty: 4.656542373906925e-10
Confirmations: 55
Chainwork: 000000000000000000000000000000000000000000000000000000000000117c
Bits: 207fffff