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: 1865
Hash: 01d1fed6fac1a9576a304185df3e0a814c63eadbcc4d9cf6ee26dba2d043f51d
Previous block: 6a02070d2c6ed5eb8b5d8c7f129a9a855405fe6e2f901d5bb537287862fc2d5c
Next block: 372d2f3d5ff1d22103b32998e199a4121e0ccc191a6d7fe29c7d3e9dc577bfe1
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159234
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 65efe4d644d8253f52a93980868eb3efb7dd9ae482d8e5b5bd47b3ca60f9537c
Median time: 1719159233
Difficulty: 4.656542373906925e-10
Confirmations: 379
Chainwork: 0000000000000000000000000000000000000000000000000000000000000e94
Bits: 207fffff