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.

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 1945
Hash: 1872146a3127cc675ba57f73764d227e80654448a1d03ac3cae7b7e3ba3f5e8e
Previous block: 2404154000f0cda58241511c1fe9586d1400436e1eb2c12b3af2a49abc9cab3a
Next block: 3186c6c5494ff9d10f5e70128102c4188fb95024acc590f00553ba4d9db1c133
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159247
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 3d4b171fe06509fb23839466448ed1c6ea15d425032c9bf5530f19cd3eed93b4
Median time: 1719159247
Difficulty: 4.656542373906925e-10
Confirmations: 299
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f34
Bits: 207fffff