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. mgqFp9Dhy

Height: 2237
Hash: 42f25029b2f15b7ee1b984de3114d436d49063e52ecbb1ab572c843572b9152f
Previous block: 7a88b367e1f909827a1a4ecb7facba48ac80c11c3414d26040d59790075a80c9
Next block: 603c42cc6e59b543688e82270f14cf2308146ec22825583bd1c6877ecde898af
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1728964809
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: f90f2cb980545448f7710cb572f8e515471576805b351193171e101a3d2291c6
Median time: 1728964809
Difficulty: 4.656542373906925e-10
Confirmations: 7
Chainwork: 000000000000000000000000000000000000000000000000000000000000117c
Bits: 207fffff