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: 1971
Hash: 6768eda8ad69c8b5cf1f3abc7449afab2bdf6f17b840f3e234bdbadbb57d0375
Previous block: 280e5783b37559fd53a8d5d5fd9f85ca24c7d338eaa793ca58b439868913fec3
Next block: 56449f8a7b49618525773d52f0fa48f87bc3107fbfe37b457a67d76ef5afa172
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159252
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 5b3a27bc54933d9ca3951375ebd9ad25edd9f207fbd31193d42482cd9fbcfd5d
Median time: 1719159251
Difficulty: 4.656542373906925e-10
Confirmations: 273
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f68
Bits: 207fffff