Message too large error while downloading attachments from mail

I am attempting to save an attachment from an email using the activity: UiPath.Mail.Activities.SaveMailAttachments

The attachment actual IS saved to the designated folder, however the process still fails with this exception:
[
Message: Could not retrieve the result of the job execution. This might be because a message was too large to process.

Exception Type: System.Exception

RemoteException wrapping System.Exception: Could not retrieve the result of the job execution. This might be because a message was too large to process.
]

I read that it may be the maxMessageSizeInMegabytes setting in uipath.config.
I changed that from 10 to 250 (way larger than the email) and I still get the error.
Any ideas?