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: 1901
Hash: 557e71c963354c0a4defa2f50f1869b97fb9b1976df27e370d6b75992c22cbd6
Previous block: 142dc3bb052b172e4abe438164c60751edda1e2f266ca3db78effd1eafcbfe3d
Next block: 63a492530ba2fbbcf004156603c88febb58c3c67c6cd0b63652ac916432e640b
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159240
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: ef7a2db7b5709fad5ee74cb52d15e4c228a6e264d9c070302e13f710f21b11ff
Median time: 1719159239
Difficulty: 4.656542373906925e-10
Confirmations: 343
Chainwork: 0000000000000000000000000000000000000000000000000000000000000edc
Bits: 207fffff