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: 408
Hash: 412df374cce2b50e3072e9bc1d7d72705346d8d67ee74a8e6721c1614c354925
Previous block: 1083fe6b181a8134214f0065d2516fdbdfae6b4a12cb4b6bff2442b62b843ec2
Next block: 616349d017c3b35aaa173177d2548b93c14f4f5b7f5908ee639bdbbf09bc9908
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701864211
Stripped size: 218
Size: 218
Nonce: 2
Merkle root: 8886e6413c9ad82e54fd27b0fdd1aecd547fd3041ef6432f39433a612c228098
Median time: 1701864211
Difficulty: 4.656542373906925e-10
Confirmations: 1836
Chainwork: 0000000000000000000000000000000000000000000000000000000000000332
Bits: 207fffff