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: 1249
Hash: 4ac94984ec35ecb218a6f89919e8afe3b8e54b173623faa4f11aa46ce086251c
Previous block: 4748579fd1e12e28e81291cffeaf0ab7aa6d7c094a130b64b2376dec4608f52d
Next block: 622dbe025de077349e13f1dbbadc28dbe6c2402d10af52e7e5b765c40a6b715f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697616
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 69487522aefad12553278e99e8d24b61e2208ab3e42c907be943d7610995351b
Median time: 1718697615
Difficulty: 4.656542373906925e-10
Confirmations: 995
Chainwork: 00000000000000000000000000000000000000000000000000000000000009c4
Bits: 207fffff