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: 1331
Hash: 2fdf20528fe09072aca43c8a066345f6f0eeb31c143efb15b24ae22f3be1a1f3
Previous block: 78dda38965380711ecc7e1913dc541e80b3855896cf9ca142cc4f97ee78b055a
Next block: 5420302966aff7920c8b660d9c6858aa49459163f4d6fe8a4f7c1d6df31460a8
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697629
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 28751cdbbe363d774e463a46867984af73c5612925fa792b95ab88234064fdd1
Median time: 1718697628
Difficulty: 4.656542373906925e-10
Confirmations: 913
Chainwork: 0000000000000000000000000000000000000000000000000000000000000a68
Bits: 207fffff