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: 1237
Hash: 3ceb35f1ec0b44974474bc025cdeaa71bd592fc31d1e6f6c43aa8f61e575cbf0
Previous block: 6544406f333aba516615de320323be33bc9a5dd4b7d7d114fd5d01b8ae20d5cb
Next block: 7a4686cf98d3a10468ba55b49a6815740db5bfd53affb72cd89a2cf298c2cfaa
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697614
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: 68c41c34e0b8659405e2044f71f51d0810de11eb073f749dcd9c5a8d2a8263a0
Median time: 1718697613
Difficulty: 4.656542373906925e-10
Confirmations: 1007
Chainwork: 00000000000000000000000000000000000000000000000000000000000009ac
Bits: 207fffff