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: 2552
Hash: 49a8049a7fec98118849b9896e6770887924cb6e93d3a131e5d2f1995eb58b3b
Previous block: 4f6652e7c8f925e3822ec39fcadb6457ff5a8d21e28f21363662cf3cf8cbbb90
Next block: 25abfea7f609e620d511e631bb26f618660f9a23e1723eb8f9167419683eca11
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847312
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 95673a4c5eea6944401ec18cc0c59c8805a8bcb488b8767980bcd55b7c0bf288
Median time: 1743847311
Difficulty: 4.656542373906925e-10
Confirmations: 91
Chainwork: 00000000000000000000000000000000000000000000000000000000000013f2
Bits: 207fffff