error: python cli.py createblockchain

[zhang123-sys]

python cli.py createblockchain --address 1NYTHzofehALBDPJvzVhhRJiGEd68Rv7ok
Mining a new block
00169e5239bc2ff12dd48f9a980a3c862fbd2e53743bc498baa5b68e8d1c84fe

Traceback (most recent call last):
File "D:\论文\区块链\blockchain-py\blockchain-py\blockchain.py", line 119, in blocks
raise StopIteration
StopIteration

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "cli.py", line 119, in
create_blockchain(args.blockchain_address)
File "cli.py", line 69, in create_blockchain
utxo_set.reindex()
File "D:\论文\区块链\blockchain-py\blockchain-py\utxo_set.py", line 25, in reindex
utxos = self._bc.find_utxo()
File "D:\论文\区块链\blockchain-py\blockchain-py\blockchain.py", line 92, in find_utxo
for block in self.blocks:
RuntimeError: generator raised StopIteration