Arweave upload fails randomly

[smacrineanu]

When I'm creating a collection using the Arweave storage, every once in a while it fails with this error:

uploading file: /mnt/c/Users/user/Documents/nft-assets/images/147.png of format: png
Traceback (most recent call last):
  File "cli.py", line 20, in <module>
    candy_machine.create()
  File "/mnt/c/Dev/AptosNFTMint/script/src/candy_machine.py", line 127, in create
    if not util.uploadFolder():
  File "/mnt/c/Dev/AptosNFTMint/script/src/util.py", line 300, in uploadFolder
    elif _STORAGE_SOLUTION == "arweave": return uploadFolderToArweave()
  File "/mnt/c/Dev/AptosNFTMint/script/src/util.py", line 277, in uploadFolderToArweave
    tx.sign()
  File "/home/user/.local/lib/python3.8/site-packages/arweave/arweave_lib.py", line 192, in sign
    data_to_sign = self.get_signature_data()
  File "/home/user/.local/lib/python3.8/site-packages/arweave/arweave_lib.py", line 204, in get_signature_data
    self.reward = self.get_reward(self.data_size, target_address=self.target if len(self.target) > 0 else None)
  File "/home/user/.local/lib/python3.8/site-packages/arweave/arweave_lib.py", line 178, in get_reward
    return reward
UnboundLocalError: local variable 'reward' referenced before assignment