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: 1979
Hash: 211c8b05a5178f4a0ed27cd48dd2396cd7c324cf078328a84b6b42ffd5ebced7
Previous block: 70ad54082647bf39fb7ffcdd14752dcd3621bbb8eb7f5c3e1ebf32e99a36c004
Next block: 0cdc8a8ea9bb8b3edc8953404e31b5d73a001d2f68ec444bc5a20e40508c47a9
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159253
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 1224d4f5ac15d41dacb0f77e6bd50640f7b9993f1bf991ba387213a656fe9ef0
Median time: 1719159252
Difficulty: 4.656542373906925e-10
Confirmations: 265
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f78
Bits: 207fffff