After setting up a universal forwarder and receiver on Windows, why am I getting "Error in 'DispatchProcess': Failed to write the info file to C:\Program Files\Splunk\var\run\splunk\dispatch\[lots of letters and numbers]\info.csv"?

I've set up a universal forwarder on a remote webserver using local system account (Win2008R2 64bit). I have enabled receiving on the receiver which is using a domain account (Win7 Pro 64bit). It asked to restart Splunk which I did. The dashboard is now showing: Error in 'DispatchProcess': Failed to write the info file to C:\Program Files\Splunk\var\run\splunk\dispatch\[lots of letters and numbers]\info.csv