I've tried to find a reason why this is happening, but there is nothing available on the official website or on the web. I recommend to double check the way EasyACCT is handling the payroll and eventually access the built-in Help section to see exactly how you need to set it up so it won't give you errors like the one above.
Additionally, look in the installation folder for help files in form of CHM and PDF formats.
In case you won't find any solution, use the following link to access customer support service: https://proconnect.intuit.com/training/