I am getting the following error:

Image too large

The exported file <file name> size of 12,584,061 bytes is larger than your Zenfolio account limit (12,582, 912 bytes). This is the error generated "sometimes" when using the Plug in for Lightroom.

I have an unlimited account. 

Thanks

For Basic and Unlimited subscribers the maximum file size is 12MB. For Premium subscribers the maximum file size is 24MB. For more information on subscription plans view the Pricing page.