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: 1389
Hash: 50360907cf96476e9a41047480790e7a0644335d2004dd217695fb32c60fccfa
Previous block: 6c6778075cfb838c3a8507c2e1cb1eee3929266be337ee6fdc7d591cbf44196c
Next block: 537455761862d8b7dc94bc7772b6979e83000850d616223dbcd42fb0b6481f5d
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697639
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 75c8ba54af4cb9c7bec04a0773b6024679635537200b9b221ac46e5a40357302
Median time: 1718697638
Difficulty: 4.656542373906925e-10
Confirmations: 855
Chainwork: 0000000000000000000000000000000000000000000000000000000000000adc
Bits: 207fffff