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: 1954
Hash: 0e73b0aa4f6a832c0fb1fb8606ee04d162dbcdfebd89c6d6f78f3b038de193f3
Previous block: 2c939b9d761be0db1993b769f88561b24607c824b00a094abd122e500c603c5e
Next block: 4275e99b585ffb0a046ecaf73970227e3293f36ad8f31219a3e548fa5ea36547
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159249
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: eff32317054ac8472e298884aaf3241e4b8a3667eee6bd3e6f9a8fe655df02b4
Median time: 1719159248
Difficulty: 4.656542373906925e-10
Confirmations: 290
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f46
Bits: 207fffff