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. mgqFp9Dhy

Height: 2219
Hash: 4a74022ca078f98e29770d50c0167acf4f56df254f32d57aa5fdaae1b8f07b0d
Previous block: 3693ea45f031fc6a6096e420f4c6672c7a009b557abce45a212199787aa8ae65
Next block: 1d502b0c906ab0de6ccc90733bb93001e2d331055b49a180e30af25aba47098f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1728964806
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: 1796afce700f16b29162c81fe85534e03e509a32c88ca653152cfb6d45b55dfe
Median time: 1728964806
Difficulty: 4.656542373906925e-10
Confirmations: 25
Chainwork: 0000000000000000000000000000000000000000000000000000000000001158
Bits: 207fffff