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: 1238
Hash: 7a4686cf98d3a10468ba55b49a6815740db5bfd53affb72cd89a2cf298c2cfaa
Previous block: 3ceb35f1ec0b44974474bc025cdeaa71bd592fc31d1e6f6c43aa8f61e575cbf0
Next block: 649495a7f146a1f11289acc68d7dc78407d155d38f40ffc2bbba8742c139d451
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697614
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: a3a791f4cc1f2fa98fa855147927805827e2d2bc4e7acd92e3f8e7e437e93d0f
Median time: 1718697613
Difficulty: 4.656542373906925e-10
Confirmations: 1006
Chainwork: 00000000000000000000000000000000000000000000000000000000000009ae
Bits: 207fffff