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: 1421
Hash: 5d8cb7252c9b154a9c74a1ed85fcc6a5a8d9f026b1a17edc7935e2f21afeee3d
Previous block: 50277627e7b3b46e24d5f695d4b5fe4cc0e00cecdc7f548e2edaf728686682e6
Next block: 302965595b6e8ea755c74271cf3fec63044d5121b5ddf7b32e1c1fa0c518229c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697644
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: 0316bfa6ad6f67d6baa66c1a9a72a8428cc93872367af541c6f0f6b084d35cad
Median time: 1718697643
Difficulty: 4.656542373906925e-10
Confirmations: 823
Chainwork: 0000000000000000000000000000000000000000000000000000000000000b1c
Bits: 207fffff