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: 1688
Hash: 3dd26f26e7d87564fc2a9e19ab4b9d8ca00857468d5ec984425820749576b366
Previous block: 4f2101b299ec3a28b9dc6aa8355d92775050ddc6c99feb06a064f2243fc6d6f7
Next block: 0ead3d89590de22b8e8419da735cc52cdf62fe934837b09e92d2e33bbf49ab32
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159205
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 0c6eb6ce859a31e2297d8727954e3ce4df9de6b3e6b91db4239a394ffbbb389a
Median time: 1719159204
Difficulty: 4.656542373906925e-10
Confirmations: 556
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d32
Bits: 207fffff