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: 1538
Hash: 21789edbc45f5697ae5ae68f2f9eb94484766fa13ff3d4f9a089d8fe12f5002f
Previous block: 046bd5259d64fd588a5a7ea0b4bb5b2d37624e094322267a6a9d21faf3ce89f5
Next block: 6a717fa1d519454d490df80b6d94216d279a14af0077f282ed4b06e54448bfdf
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697664
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: ad12011d5ccc8e3849b580c91d39bcef6ccb832200ebe71803e0bc0bb6e6ae82
Median time: 1718697663
Difficulty: 4.656542373906925e-10
Confirmations: 706
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c06
Bits: 207fffff