Manager fails to send Invoices

Attempting to email invoices and consistently fail to send - error message is:

The remote name could not be resolved: ‘

Any assistance would be helpful. No settings have been changed, this first occurred about a week and a half ago. I am using the desktop version of Manager.

Update to the latest version. That should solve problem. There have been many, many posts about this on the forum.

Just did it - Thought of it after posting on the forum.

Thank you