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: 1683
Hash: 324d579156612c7ae2be018ac1559fa0c258071afea0c8c4afb8eb11c35ed74e
Previous block: 1a1ea046466fedbb8f46baa7686731eefa881c7e0b3b2c78d7e5e42adc32ab47
Next block: 3a664df9ce912c7b6222d5935212567139dcf90ab5f190073f6aa95219a306f0
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159204
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 0703cfa7e140f5a495491cad69bf3f7b4bed1c61df1ded56015e9806ca965e8c
Median time: 1719159203
Difficulty: 4.656542373906925e-10
Confirmations: 561
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d28
Bits: 207fffff