Acembly requires full permission API keys. If you are trying to use Acembly with limited permission API keys, this will prevent Acembly from gathering all information needed to perform properly.
A common issue is that Acembly users do not have full account access with the API keys entered.
This will prevent the user the from accessing or moving files.
Please confirm that the API keys that you've entered have full access and if they don't, please re-enter keys with full permissions in your cloud account.