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: 1304
Hash: 186ffd230a083658757cff96485db1aaadb7993736419d62e0bbf736a265a9f7
Previous block: 67f870092add2b42fb58134e40493a5419eb82217b07f44b631a11dbabb31302
Next block: 54a69adcb4a9823df706b124393cb2d2ecc587a94a1af9ad2fbb29e32ca3e891
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697625
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 1ae00aa0aa23d222de2fef9c775c4e5266cd7e6053fa2e7b3dbe49bca8f26d21
Median time: 1718697624
Difficulty: 4.656542373906925e-10
Confirmations: 940
Chainwork: 0000000000000000000000000000000000000000000000000000000000000a32
Bits: 207fffff