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: 2123
Hash: 3e1b9e94b590bf06886b709511a191ae959e9fb10b97be3dc992c1104b3f32b3
Previous block: 7f4a5b1c0a8cd106291e0908631f817c25b7c316e9230ac1e84cc56773907625
Next block: 0e1fbcfef3174e2a90aba31cc38330ef2e04eea76aae4a5ce3ee967c0a7d9eb0
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1728964790
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: 964b831748213416e09792fe474dba7e4ebad8c6c90c37c807a296f40f5da984
Median time: 1728964790
Difficulty: 4.656542373906925e-10
Confirmations: 121
Chainwork: 0000000000000000000000000000000000000000000000000000000000001098
Bits: 207fffff