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: 1300
Hash: 44bb320504081cb8fc6bcbdeed226fe64dcfd8065d1743ac9290c2eaa40f2fb3
Previous block: 6ae8aa12727a36810a2e8e266f1084a4150472b39fa19cf4087bd3e4c0dcc5f3
Next block: 64960f4c4ce21b4769e2cb388ce0694c7a886781cf2a99f9a2a45c3cef397519
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697624
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 443e1c092a7fe99e8fc3b88417194c3b9f774a32907ad950f7e2a8635b50b34d
Median time: 1718697623
Difficulty: 4.656542373906925e-10
Confirmations: 944
Chainwork: 0000000000000000000000000000000000000000000000000000000000000a2a
Bits: 207fffff