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.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 2139
Hash: 7ed61e1cf8f5751b43c6ccd016c7e2fb861095d9df27d38c86001ba337343e5e
Previous block: 25de30ea7a03024ab192dc63575d9c9e4c87b5e3fffcc934f8ff6e13f694bfec
Next block: 4c201105d66207c48eba27aa960a4368a1973fda2b2c3ecdca48a9ac33c4e785
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1728964793
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 81f2f5e3a0790253a63322d914a4ed239ecf243d62c42ede5f004ccbed3fa440
Median time: 1728964792
Difficulty: 4.656542373906925e-10
Confirmations: 105
Chainwork: 00000000000000000000000000000000000000000000000000000000000010b8
Bits: 207fffff