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: 1681
Hash: 4c4cb8d5eb2c5e7cdc9f90dcd9baf6777e1ad0be115256e45b7799f2d687433f
Previous block: 296bf96dcea198c9d2b6631a00d06a2f9dfc5d2e32b89c4a866e1b28097bbac1
Next block: 1a1ea046466fedbb8f46baa7686731eefa881c7e0b3b2c78d7e5e42adc32ab47
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159203
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 60757f67148dc3354e029612ecc4f3d9438dedbd54e18f4c107c4e31e0e6f6fc
Median time: 1719159203
Difficulty: 4.656542373906925e-10
Confirmations: 563
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d24
Bits: 207fffff