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: 2013
Hash: 2c97be13b55fca183c449e5190084e500f6e5c3cb1a1481927d108e451bebd35
Previous block: 2fc63dc2a70a740bef3a8ff74d48462f8f6d1b44d6b0f1e6177e22c04a90d358
Next block: 7dba66bc43f7bb54aed02c562f608db80f7002859f8dd83fe85f46e90af4f47d
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1728964772
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 8bb679bade73ac1631a1fcce8a485cbe5ded0bb72826583ed02cae1581b800ac
Median time: 1719159258
Difficulty: 4.656542373906925e-10
Confirmations: 231
Chainwork: 0000000000000000000000000000000000000000000000000000000000000fbc
Bits: 207fffff