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: 1991
Hash: 0b13bd68af49ca0e4e3627f337ca3822c049ec0f46e3848970e6c9c55c8b7346
Previous block: 10bf925b8903fde1a43263b0511ffca332c113be26f24578961f08e4cb17d1c6
Next block: 4b1c1b8ab5be76bd813b06408924380ee2c61301bf8e64870cbc9f27f7559a88
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159255
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: af69b70f46df28010292598825734523e5865476c3de9512a3bb938fe6963962
Median time: 1719159254
Difficulty: 4.656542373906925e-10
Confirmations: 253
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f90
Bits: 207fffff