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: 1640
Hash: 7ddfb0bcc23a4cf58646d01283d3b30912b596a6dca7bcc2a7881ff2606d591d
Previous block: 4042d39d367f86fb6b31e880c119fdc6247598199aac0b9cc64e27f1a5069e07
Next block: 00f5fc211de432412355fcafd5add6439afb332d066ac24a68f1939dff2b59d1
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159197
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 36df8da3fdd9bf907eb9161e66670947eedc9ed95ac1137b4822e4cd90e7bcb5
Median time: 1719159196
Difficulty: 4.656542373906925e-10
Confirmations: 604
Chainwork: 0000000000000000000000000000000000000000000000000000000000000cd2
Bits: 207fffff