Unhandled exception: Instance of 'AlgorandException'

[nodajifi]

Thank you for contributing a very useful code for our community. I am using the latest version (1.0.3) of algorand_dart sdk.

Except create_accounts.dart, contract_account.dart, and rekeying.dart in an example directory, the rest of example codes always provide the following error message. The error always occurs in *.sendTransction. Please give me comments on how I can handle with it.

#0 TransactionRepository.sendTransactions
package:algorand_dart/…/repositories/transaction_repository.dart:136

#1 Algorand.sendTransactions
package:algorand_dart/src/algorand.dart:248

#2 main

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