I have never seen an error like that. First do you have full permissions for your groups TroopTrack account, perhaps there could be a weird permissions issue? Second have you found this article that talks about how to use Money Accounts? If there isn’t anything in there that helps I think this will need to be e-mailed over to support@trooptrack.com, make sure you include as much detail as possible, specific money accounts, what process you are using and even screenshots if possible. This is definitely not the norm so not sure what is going oin.
Money Account Basics