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: 1551
Hash: 288f89ec751d2c72cfdb9ca1473dd3cfebb8766c474deabefdf01832f3700be1
Previous block: 53042c5325924b5f370717650f464afd0c089f0371583848d2c62398fafe985c
Next block: 267bdf8ae9cbb34bb5e3710a55c464aa40a0793e57aa3c6381fb5d7d9a63a2b6
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697666
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: bf477fbe92861ac42cc6ac0a98da4bdac0223d560218666688259c929bf12a5d
Median time: 1718697665
Difficulty: 4.656542373906925e-10
Confirmations: 693
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c20
Bits: 207fffff